Milestones (Power Rangers)

As a franchise, Power Rangers is constantly evolving and changing, with new ideas and concepts emerging with each series, both stemming from the original source, Super Sentai and as written into the adapted show. This is a real-world documentation of the evolution and the milestones in the franchise, showing the changes, advancements and quirks which emerge with each new series since originally starting in 1975.

Season One

 * First to be adapted from Super Sentai
 * Established a five-man team with a Sixth Ranger
 * Established the use of morphers.
 * Established the use of sidearms.
 * Established the use of combining weapons.
 * Established the use of Zords.
 * First to switch a Ranger's genders from the original source.

Season Two

 * First to have a second Megazord combination for a team.
 * First adaptation to not use the adapted season's rangers' suits.
 * first villain exclusive to Power Rangers.

Season Three

 * First to have a third and fourth Megazord for a single team.
 * First Rangers with Ninja-based powers

Alien Rangers (Mini-Series)

 * First to have non-combining zords.
 * First team to be led by a female, with Red taking point as figurehead.

Zeo

 * First full-on change of powers, suits and arsenal for the titular Rangers.

Turbo

 * First to premiere with a full-length movie.

Wild Force

 * First series to have a team-up featuring a team from various other teams.

Dino Thunder

 * Only series with four Rangers on the core team.

Jungle Fury

 * First purple ranger joins the team.
 * First Black/Green ranger-like ally duo.
 * First ranger-like duo to start out evil then later turned good.
 * First extra heroes whose zords can combine with those of Rangers'.

RPM

 * First 6th Ranger duo.

Samurai

 * First heroic team to have a female Red Ranger.