This article is about a/an ranger/ally in Mighty Morphin Power Rangers and Power Rangers Zeo.

"It's time for mollecular transmutation! Triceratops!"
―One of Billy's roll calls.[src]

"Jason! That blow didn't even faze him!"
―Billy's most infamous line after the Megazord punched Goldar down in spite of the line not syncing up with the action.[src]

"We can't back off! Just because we're in a little trouble, we've gotta keep trying!"
―Billy after Zack suggested backing down whilst the Megazord was taking a beating from the Grumble Bee's sonic attacks.[src]

Billy Cranston is the Blue Ranger of the Mighty Morphin Power Rangers.

Retroactively, he is also referred to as the Mighty Morphin Blue Ranger or Blue Mighty Morphin Ranger, though these are terms of address referencing the show as opposed to proper labels.

Until his departure, he was considered the brains of the Power Rangers team, creating many gadgets with which to solve problems that not even Zordon foresaw, and even invented the first team's wrist-worn communication devices (it is believed, though not proven, that he created every other communicator up until his departure from the show).

Character History

Mighty Morphin Era


Billy was one of the five "teenagers with attitude" selected by Zordon to become the original Power Rangers, along with Jason Lee Scott, Zack Taylor, Trini Kwan, and Kimberly Hart. Billy became the Blue Mighty Morphin Power Ranger due to his intelligence and patience. He was given both the Triceratops Power Coin and the Triceratops Dinozord.

Billy began the series as the stereotypical "nerd," speaking almost exclusively in technobabble throughout Season 1. His closest friend throughout the series was Trini, to whom he could communicate most comfortably and effectively. He was initially very insecure about himself, making him an easy target for people like Bulk and Skull, who tormented him often in the beginning. The other Rangers, especially Trini, defended him loyally, and Billy later evolved to become a stronger individual. He was one of the top members of Angel Grove High's science club and often helped its younger members with their experiments. One such person was Willy, a young boy who he helped to create a virtual reality simulator for a Science Fair. In the episode "High Five", Billy not only created the communicators, but also the interface that allowed the devices remote access to the Command Center's teleportation unit.

Zordon chose Billy to become the Blue Ranger.

It was revealed that Billy was bitten by a fish in his youth during an experiment involving whirlpools, causing him to develop icthyophobia: fear of fish. This fear would persist well into his teens and Rita would use a spell to exacerbate this fear. When he was the last remaining Ranger able to contend with the Goo Fish monster, Billy overcame the spell, freeing his friends and helping tob defeat the monster. He later completely overcame the fear while on a fishing trip with Ernie, the owner of the Youth Center.

Each of Billy's teammates had a unique skill to offer the team and, in Billy's case, it was his vast intelligence. He sought out to improve himself physically, and the audience would see him transform over time from the suspenders-wearing "brain" to a confident, hyper-intelligent athlete with appreciable fighting skills, thanks in great part to Trini's Uncle Howard, Jason, and later Tommy, helped graduate Billy to the red belt level in karate.

Billy facing his ichthyophobia.

Billy's intelligence would help the Rangers save the world on many occasions. When the Command Center was damaged, Zordon lost and Alpha incapacitated, it was his invention, the RADBUG that allowed the Rangers to travel to the Command Center. As a Ranger, he had a wide array of accomplishments, including creating the method by which the Ranger's would initially infiltrate Rita's Dark Dimension to disarming the lock-out mechanism for Alpha's activated self-destruct. Though Billy did manage to attract girls earlier in his "nerd-like" persona, it was after he began his journey toward self-improvement that he would garner more attention from romantic interests, to the point of getting more than the other members of the team.

Billy was accepted into the Young Scientists of America program. He befriended Zack's cousin Curtis when he became the newest student at Angel Grove High. Curtis' musical interests, particularly his interest in and skill at playing the trumpet, sparked Billy's intrigue in the rhythmic patterns of jazz music.

Zedd's Invasion

When Lord Zedd invaded Earth after doing away with Rita, Zordon upgraded the Dinozords into the Thunderzords; Billy was given control of the Unicorn Thunderzord. When Zordon and Alpha disappeared, Billy was the one to find the secret door where they were making the White Ranger. While most of the other Rangers were disappointed in a new member suddenly joining them, Billy knew that they needed a new Ranger to help them against Zedd, regardless of who it was. However, he was happy to find that the White Ranger turned out to be former teammate Tommy Oliver.

New Friends and Teammates

One day, while rollerblading in the park with Tommy and Kimberly, Billy unexpectedly met Rocky DeSantos, Aisha Campbell, and Adam Park, and helped them stop a runaway stroller carrying a teacher's baby boy. When Zedd kidnapped the new teens, intending to change them into his own Dark Warriors, Billy, Tommy, and Kimberly set out to rescue them. Billy entered the cave where the teens were being held and grabbed the evil snake that would turn them evil. However, the snake wrapped itself around Billy's neck, and he was forced to remove his helmet to ensure he could breathe, thus revealing his identity to Rocky, Aisha, and Adam. The trio swore to keep the Rangers' secret and became friends with everyone. When Jason, Trini, and Zack were chosen to attend a peace conference in Switzerland, Billy and the Rangers had to retrieve the Sword of Light to allow the Rangers to transfer their powers. Though Billy was sad to see Jason, Trini, and Zack leave, he was happily surprised that Rocky, Aisha, and Adam would take their respective places as new Rangers.

When Kimberly fell through a time warp to the days of the Wild West, she would recruit Billy's ancestor William in the 1880s to become the first Blue Ranger when she assembles and takes command of the Wild West Rangers team in a battle against Goldar and several other time-traveling foes.

Ninja Quest

"It's Morphin Time! Blue Ranger Power!"
―roll call as the Mighty Morphin Blue Ranger[src]

Billy receives his Ninja Powers.

After the Thunderzords were destroyed by Rito Revolto, Billy and the other Rangers sought out Ninjor, the creator of the Power Coins, to give them new powers. Billy became the Blue Ninja Ranger and controlled the Blue Wolf Ninjazord. Billy used his intelligence to enable the other Rangers to control the Shogunzords and would personally control the Blue Shogunzord.

Mighty Morphin Alien Rangers

The Rangers were de-aged by a time-reversal spell performed by Rita Repulsa's father, Master Vile. Billy devised a plan to restore the Rangers' proper ages using a machine that ran off of the Power Coins. Billy restored himself, but Goldar stole the machine, and Zedd and Rita destroyed all six Coins.

Billy and the Alien Rangers.

With his Wolf Ninja Coin destroyed and his Triceratops Power Coin damaged beyond use, Billy's role changed. He no longer fought as a Power Ranger, and did not join the remaining active Rangers in their search for the Zeo Crystals and acted solely in an advisory and supporting role, serving as a liaison between the Alien Rangers during this period.


Billy officially retired from active Ranger service, allowing Tanya Sloan (who was sent back in Aisha Campbell's place) to take his place as an active Ranger in the field. He continued in the support role he had adopted during the Aquitian Rangers' time on Earth, assisting Zordon Alpha 5 with tasks in the Power Chamber and creating and maintaining most of the weaponry, gadgets, and Zords the Zeo Rangers would use. He traveled briefly to Aquitar to assist the Aquitian Rangers in battling with a race of aliens called the Hydro Contaminators. To do so, he completed a prototype device that Cestro started to defeat them. Upon his return, his ship was diverted by King Mondo to fly straight into the sun. From the Power Chamber, Zordon, Alpha 5, and the Rangers were able to rescue him.

Billy gives his Zeo Subcrystal to Tanya.

Before Trey of Triforia was revealed to be the identity of the Gold Ranger, several red herrings mislead the viewers into believing that the Gold Ranger was Billy. When Rocky confronted him with this theory, he assured the team that he would never have kept such a secret from them, and had simply been busy working on a never-specified project (most likely the development of the Turbo powers). When Trey returned to Triforia on sabbatical to try to unify his three selves, Billy was selected to assume Gold Ranger's powers. However, the "negative proton energy" that his body had absorbed in the Command Center's explosion prevented him from taking the powers. Instead, Jason, the former Red Ranger (who, being nowhere near the Command Center at the time of its explosion, was a safe choice), received the powers.

Billy was last seen to be suffering from accelerated aging because the regenerator he used to restore his proper age had a side effect. To counter this, he traveled to Aquitar for a cure from their Eternal Falls (analogous to the Fountain of Youth), and opted to remain there with Cestria, a female Aquitian with whom he had fallen in love.

Dino Thunder

Tommy and Team Original Photo.jpg

Billy was featured in a chronicle of Power Ranger history compiled by Tommy Oliver shortly after he formed the Dino Rangers, which was found by the nascent Ranger team in the Dino Lab. Legacy of Power A photo of Billy with his original Ranger team was later found by Kira Ford while helping Tommy. Bully for Ethan

Super Megaforce

The five Mighty Morphin Power Rangers join the battle.

Billy and the other Mighty Morphin Power Rangers returned as part of the army of Legendary Rangers led by Tommy that helped the Mega Rangers defeat the Armada once and for all, fighting in a huge battle against hundreds of X Borgs and dozens of Bruisers. It is not explained how he returned to Earth from Aquitar, possibly by the same teleportation that the Aquitians used. He returned to Aquitar after the battle. It is unconfirmed how he reclaimed his old Blue Ranger powers. Legendary Battle

Beast Morphers

The other four Mighty Morphin Power Rangers come to help.

Billy responded to Jason's signal and returned alongside his fellow Mighty Morphin Power Rangers as part of the Legendary Dino Rangers army. When Evox summoned his massive Chimerazord, his team joined in summoning the Megazord and aiding in its defeat. With Evox on the run again, the teams departed. Billy went back into his own dimension and, even though it's not officially stated, he probably returned to Aquitar. Grid Connection


Ranger Forms

Ranger Costume

As The Blue Ranger of the Mighty Morphin Power Rangers. Also retroactively known as Mighty Morphin Blue Ranger or Blue Mighty Morphin Ranger (unofficial titles). During Season 3, his suit changed slightly, showing the Wolf Ninja Coin in his Morpher, rather than the Triceratops Power Coin.



Appearances: MMPR S1 Episodes 1-15, 17-60, MMPR S2 Episodes 1-21, 23-38, 40-43, 46, 47, 49, 50, 52, MMPR S3 Episodes 1-4, 6-15, 18, 20-24, 26-33, SM Episodes 20 & LBEV, BM S2 Episode 13

Blue Ninja Ranger

As The Blue Ninja Ranger of the Mighty Morphin Power Rangers.



Underground Movement

Billy attacking from underground

Appearances: MMPR S3 Episodes 6, 8-10, 12, 14, 15, 17, 19, 21, 24, 25, 27, 28

Metallic Armor

When the Blue Ranger dons metallic armor, the blue in his suit is metallized while the whites are coated in light silver. In this form he can execute high speed martial arts moves with added metal-like impact.

Appearances: MMPR S3 Episodes 29-33

Pink Ranger Costume

In the episode Switching Places, Billy & Kimberly switch bodies.



Appearances: MMPR Episode 16

Behind The Scenes


The character was played by David Yost in both the unaired pilot and the series. His final appearance as Billy was in the second part of the two part episode "King for a Day." The identities of both the actor who played elderly Billy in the two part episode "Rangers of Two Worlds" and the voice actor who delivered his goodbye message in the part II of that episode are unknown since only Yost was credited despite his absence. Billy also appears in the video game Power Rangers: Super Legends alongside some of his Ranger teammates and was voiced by Brian Donovan.


Billy's departure remains the most controversial exit in the show's history. Yost last played Billy in the episode "King for a Day" before leaving under suspicious circumstances with an unknown actor playing him in "Rangers of Two Worlds" and an uncredited voice actor doing his voice during his goodbye message. According to Saban themselves, Yost left due to disputes over thier contract and pay similarly to the events surrounding "The Power Transfer." However, the more commonly accepted explanation is that Yost left due to being bashed as he was homosexual with the explanation from Saban being thought of as sugar coating.

Legendary Ranger Devices

The Mighty Morphin Blue Ranger Key.

The Blue Mighty Morphin Ranger Key is Billy's personal Ranger Key. This key along with the majority of the Core Ranger Keys are seen lining the Command Center's interior walls. This key is mainly used by Noah Carver (Super Megaforce Blue) who uses it to fight as the Blue Mighty Morphin Ranger.

MMPR Blue Dino Charger

As part of SDCC 2015, Bandai released an exclusive Dino Charge Mighty Morphin' Charger set with each Dino Charger depicting four pictures. In Mighty Morphin' Blue's case, it featured his Ranger form, the MMPR title, the Triceratops Dinozord, and the Power Lance.

MMPR interactive CD-ROM

  • Billy's birthday was given as April 1, making him an Aries.
  • Billy's birthplace was given as Chicago, Illinois.
  • Agreeing with the later Fan Club Video, Billy's favorite food was guacamole cheeseburgers.
  • Billy was developing theories on gravity manipulation.
  • Billy was a member of the debate team, the science club, the math club, the chess club, Mensa, and the William F. Buckley Vocabulary Society.

MMPR fan club video

  • Being interviewed, Billy sat in his lab; he had light brown hair and wore a blue shirt and his thin-framed glasses, using absolutely no technospeak, and furthermore using the occasional bit of incorrect grammar; whether he wore a communicator is unknown.
  • As a child, Billy had started reading very early and had read the newspaper with his dad; then when he went to school, he became interested in science and the world.
  • Recalling a frightening experience, Billy described fighting Madame Woe to save Marge, his girlfriend at the time; he said it had been hard and scary, but he'd done it.
  • Billy gave his favorite food as guacamole cheeseburgers, adding that he liked a lot of fast food, such as pizza, French fries, and hamburgers.
  • Billy said he tried to use his mind over muscle in his normal state, and even when fighting Putties, he'd try to outsmart them to make them injure or destroy themselves; if he had to get physical, he said, he would do it, but he used it only as a last resort.
  • Billy remarked that being smart could take you anywhere in life, and he said that his intelligence often allowed him to help devise solutions to problems since Zordon and the other teens didn't always have the answers.
  • Billy said he was a straight-A student, which would take him somewhere after high school; he planned to move on to college and hopefully become one of the world's leading scientists.
  • Billy listed honor, respect, and courage as the most important things he'd learned from Zordon.
  • Talking about her friends, Kim said that Billy was great, because he was so smart, and she would always go to him for help with homework; he was such a giving person, he always helped out.


Appearances in other media


Alter ego Designation Dimension
Billy Cranston (Tom Silardi) Bio-Rhythm Blue Bio-Man (1986)
Billy (David Yost) Blue Ranger Lost Episode (1992)
Billy Cranston (David Yost) Blue Ranger (I) TV series
Billy (David Yost) Blue Ranger (II) TV series
Billy Blake Blue Ranger Hamilton Comics
Billy (David Yost) Blue Ranger MMPR: The Movie (1995)
Billllly Blue Meower Ranger

Mighty Morphin Meower Rangers (2017)

William "Billy" Cranston (RJ Cyler) Blue Ranger (II) Power Rangers Movie (2017)
Billy Cranston Blue Ranger Boom! Studios
Billy Cranston Blue Ranger Boom! Studios


  • Billy is the only original Power Ranger to remain for the entire MMPR series and is the second longest-serving Ranger in the show's history, active for three seasons straight, behind only Tommy.
  • Billy received a tribute in the credits of Rangers of Two Worlds part II.
  • Billy is one of only three Blue Rangers to never act as the team's second in command. The others were Lucas Kendall and Max Cooper.
    • Ironically, Billy is the longest-running and arguably lowest Ranking ranger of the original five. Unlike seasons such as Lightspeed Rescue and SPD, Mighty Morphin does not explicitly state where each Ranger ranks among the team. However, it is very clear that Jason and Zack were the leader and second-in-command respectively. Billy may have been next in line but he never administers the morphing call within Season 1 and there have been separate instances in which Billy went into battle alongside Kimberly and Trini, both of whom used the morphing call instead of him (even though his Sentai counterpart outranks theirs). However, when Aisha, Adam, and Rocky joined the team, even though Rocky is the second-in-command, he and Kimberly have a higher rank in command due to being originals. 
  • Billy was a Red Herring for the identity of the first Gold Ranger.
  • Billy is the only Ranger to keep a single power for three seasons without giving it away or switching colors, and the only "original Ranger" to not be replaced, as he stepped down from his position at the start of Zeo.
    • Technically, Billy's powers were replaced once, going from the Triceratops powers to the Wolf powers between season 2 and 3. Even though his suit remained the same, the different coins can be considered as a new power. This also makes him the only male ranger who changed powers at least once to never change suits.
  • Billy is the only Ranger to retire from being a Ranger, but not immediately leave the show.
  • Because of the absence of Yost (he had left the show a few episodes prior to his character's departure, hence his lack of appearance in them), stock footage of Billy was used for his departure and his character was voiced by someone else. He was also the last of the original Power Ranger team to leave the show, although his former teammates Jason and Kimberly would later reappear in Turbo: A Power Rangers Movie and Jason alone in the Wild Force episode Forever Red. Also of note is that backstage, David Yost (Billy's actor) left the show on bad terms, causing the writers to change the Turbo movie's plot so that the Rangers created the Turbo powers themselves with Alpha 5's assistance rather than by Billy himself. Some fans conclude that during Billy's absences during the misleading plots that made him seem like the Gold Ranger, Billy was creating the blueprints for the Turbo powers.
  • David Yost's departure from Power Rangers occurred as a result of drama behind the scenes. Yost, at the time struggling with his homosexuality, was frequently harassed and insulted by the show staff. Unable to reconcile, Yost left the show and was written off without involvement in filming the episodes that would remove Billy for good.
  • In Power Rangers: Zeo, his teleportation color is white, as it is the teleportation color for all civilians and/or White Rangers. In Rangers of Two Worlds Part 2, his last episode, his teleportation color is a black molecule, to match the Aquitians' teleportation.
  • Billy is the only Ranger in Mighty Morphin to blink in his morphing sequence.
  • Billy has been turned into a child twice, along with Tommy, Adam, Aisha, and Rocky. The first time, he supposedly loses his Ranger memories even though he still has a connection to the Morphin Grid. The second and final time, he and the others keep their memories.
  • According to IMDb, Walter Jones was originally cast as Billy. However, when he auditioned, he said he thought he'd be more recognizable as the Black Ranger, so he was re-cast.

Billy as a punk in Power Rangers Punks

  • Billy is the first Ranger to show his underwear - boxer shorts. In the episode Power Ranger Punks, Billy sags his boxer shorts while under the influence of the punk potion. Once the effect of the potion is removed, Billy realizes this and hides his boxers.
  • Billy frequently dressed in clothing that was oversized or otherwise baggy or frumpy, in an effort to cover David Yost's well-defined physique due to him being a gymnast (as he was supposed to be a nerd, and thus, not entirely athletic). This effort was gradually dropped by the second season of MMPR.
  • Billy is the first Blue Ranger to turn evil. The second one was Tori in Power Rangers Dino Thunder (Blake Bradley is considered a Navy Ranger because Tori Hanson is Ninja Storm's Blue Ranger.) and the third one was Kevin in Samurai.
  • Billy is the first Blue Ranger to have an individual evil clone. The second was Tori Hanson of Ninja Storm.
  • Billy is the opposite of his Sentai counterpart; Billy is a serious, analytical nerd, while Dan is the immature comedy relief. However, he shares his intellect with Zack's Sentai counterpart.
  • During the 2010 reboot of Mighty Morphin' Power Rangers, a toy version of Billy was seen with the Dragon Shield, though Billy never wore Tommy's Dragon Shield in the show.
  • Billy, along with Tommy, Adam, Kimberly, Rocky, and Jason are the only Rangers to appear in more than 100 episodes.
  • Billy is the first Ranger to wear glasses. Others are Kendrix Morgan, Danny Delgado, Cameron Watanabe, Noah CarverKendall Morgan, and Nate Silva.
  • Billy is the first Blue Ranger to not join his team in the next installment (Zeo). This is repeated with Rocky DeSantos (Turbo) and Justin Stewart (In Space).
    • Interestingly, all 3 were Blue Rangers when they departed (as Rocky was red initially, unlike the others)
  • Billy is a male name and commonly a nickname for William, in the TV series it is used as a name and in its alternate versions of the 2017 comic and movie as a nickname.
  • It is said that actor Bryan Cranston was the inspiration for Billy's last name.[1] However, the name was already used in the Bioman pilot.
  • Judd Lynn had originally intended for Billy to be the true identity of the Phantom Ranger, however, this plot was eventually dropped.
  • Billy is the first Ranger to have a fear of fish. The second ranger was Antonio Garcia.
  • Billy has the same initials as a future ranger, Bridge Carson.
  • In the Bio-Man pilot, his name was shared with the counterpart to Blue3, and rather than super-intelligent, he was a "Heartthrob with a body of steel" and he was a Pisces at the time, not an Aries.
  • Billy is the only Ranger of the Mighty Morphin team to entirely start and finish his duties as a ranger, in this case, his Blue Ranger powers. Jason, Zack, Trini, and Kimberly left and were replaced by Rocky, Adam, Aisha, and Kat respectively and Tommy lost his Green Ranger powers and became the White Ranger.
  • Billy is a playable character in Power Rangers Legacy Wars.
  • Despite rumors that Billy was originally meant to be the Gold Ranger, David Yost has since confirmed that there were no plans for this.[2]
  • Billy was the first of the Power Rangers to graduate from high school a full year earlier than he was supposed to since he had completed more credits than any other student at Angel Grove High School.
  • Billy maintained a straight 4.0-grade point average(all 'A's) while in high school.
  • Billy's uncle owns a resort in the mountains near Angel Grove.
  • Billy was the creator of the RADBUG, the modified Volkswagen Beetle.
  • When Billy was younger, he graduated from the Accelerated Baby Genius Program.
  • Billy was a member of the Young Scientists of America club.
  • Billy and Justin are the only Power Rangers without a pierced ear.
  • Billy and Justin are the only male Rangers who never taught kids martial arts.

See Also



Blue Rangers
Billy (1995 movie)Billy (2016 comic)SergeBilly (2017 movie)EddieNikolai

Secondary Rangers
NinjorAuricBlue SenturionBlakeShark RangerJames
Billy PuttyPuttyBobbyWilliamBilly CloneStanfordBlue Shadow RangerRobo JustinBlue Creep
Psycho BlueBlue Cyborg RangerEvil Time Force BlueShark Shadow RangerEvil BlakeA-Squad Blue
Evil Blue Mystic RangerEvil Blue Overdrive RangerCenozoic era Blue RangerRobo Blue Space Ranger

Power Sets
Blue RangerBlue Aquitar RangerZeo Ranger III BlueBlue Turbo RangerBlue Space Ranger
Galaxy Blue RangerBlue Lightspeed RangerTime Force Blue Ranger
Blue Wild Force RangerBlue Wind RangerBlue Dino RangerS.P.D. Blue RangerBlue Mystic Ranger
Blue Overdrive RangerJungle Fury Blue RangerRanger Operator Series BlueBlue Samurai Ranger
Megaforce Blue RangerSuper Megaforce Blue RangerDino Charge Blue RangerDino Charge Aqua Ranger
Ninja Steel BlueDino Charge Dark RangerBeast Morphers Blue RangerDino Fury Blue Ranger
Blue Ranger (movie)

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