|This article is about a/an episode in Tensou Sentai Goseiger.|
Over The Rainbow (オーバー・ザ・レインボー Ōbā Za Reinbō) is the twenty-second episode of Tensou Sentai Goseiger and the 1700th episode of the Super Sentai Series. It introduces the combined form of the two major mecha: Ground Gosei Great.
When the Yuumajuu who sealed away Gosei Knight 10,000 years ago returns, the rogue Headder tries to handle the battle on his own while continuing to see the modern Goseiger in his way.
After accepting Makuin's offer to finish things with Groundion, Uobouzu of the Nessie starts attacking humans by going on a shadow-eating spree. When the Goseigers arrive, Gosei Knight recognizes the attacks to be Uobouzu's work as the Yuumajuu reveals himself.
With the Goseigers unable to fight back, Gosei Knight tries to fight Uobouzu, but Uobouzu takes his leave when a cloud blocks the sunlight. Later, as Gosei Knight feels that the current Gosei Angels are weak compared to their predecessors, the Master Head describes to the others Groundion's fight with Uobouzu in the past, but this is cut short as Datas reveals that they need to destroy the Yuumajuu to save his victims.
The next day, Uobouzu resumes his attack before the Goseigers intervene and attempt to use their Tensou Techniques to create a rain storm, preventing Uobouzu from eating any more shadows. Gosei Knight arrives as the plan fails and fights Uobouzu himself until the Goseigers come to his aid. Understanding that the Goseigers' intent to help him and using their shadows as bait to trap Uobouzu, Gosei Knight assumes his Headder form to rip the Yuumajuu's tongue off before using the Knight Dynamic attack to defeat Uobouzu. When Uobouzu is revived through the Bibi Bugs, the Goseigers form Gosei Great and Gosei Knight becomes Gosei Ground to fight the enlarged Uobouzu. The two formations are not strong enough to defeat the Yuumajuu and are broken up. While things look grim, the Goseigers and Gosei Knight decide to combine their Gosei Machines to form Ground Gosei Great. Together, they destroy Uobouzu before it starts raining. Soon after, Gosei Knight finally accepts the Gosei Angels but he feels they need a bit more training. He takes his leave, as a rainbow forms in the sky after the rain stops.
- Alata (アラタ Arata): Yudai Chiba (千葉 雄大 Chiba Yūdai)
- Eri (エリ): Rika Satoh (さとう 里香 Satō Rika)
- Agri (アグリ Aguri): Kyousuke Hamao (浜尾 京介 Hamao Kyōsuke)
- Moune (モネ Mone): Mikiho Niwa (にわ みきほ Niwa Mikiho)
- Hyde (ハイド Haido): Kento Ono (小野 健斗 Ono Kento)
- Gosei Knight (ゴセイナイト Gosei Naito, Voice): Katsuyuki Konishi (小西 克幸 Konishi Katsuyuki)
- Nozomu Amachi (天知望 Amachi Nozomu): Sakuya Nakamura (中村 咲哉 Nakamura Sakuya)
- Datas (データス Dētasu, Voice): Kōki Miyata (宮田 幸季 Miyata Kōki)
- Makuin of the Blob (ブロブの膜イン Burobu no Makuin, Voice): Chafurin (茶風林 Chafūrin)
- Kinggon of the Bigfoot (ビッグフットの筋グゴン Biggufutto no Kingugon, Voice): Kosuke Takaguchi (高口 公介 Takaguchi Kōsuke)
- Buredoran of the Chupacabra (チュパカブラの武レドラン Chupakabura no Buredoran, Voice): Nobuo Tobita (飛田 展男 Tobita Nobuo)
- Master Head (マスターヘッド Masutā Heddo, Voice): Ikuya Sawaki (沢木 郁也 Sawaki Ikuya)
- Uobouzu of the Nessie (ネッシーのウオボ渦 Nesshī no Uobōzu, Voice): Junpei Morita (森田 順平 Morita Junpei)
- Couple: Fumitaka Otoguro (乙黒史誠 Otoguro Fumitaka), Mariko Terada (寺田万里子 Terada Mariko)
- Child: Masaki Izawa (伊澤柾樹 Izawa Masaki)
- Gosei Red - Twistornado, Gosei Dynamic, Gosei Dragon, Gosei Great, Ground Gosei Great, Victory Charge (Ground Gosei Great)
- Gosei Pink - Twistornado, Gosei Dynamic, Gosei Phoenix, Gosei Great, Ground Gosei Great, Victory Charge (Ground Gosei Great)
- Gosei Black - Rockrush, Sparquake, Gosei Dynamic, Gosei Snake, Gosei Great, Ground Gosei Great, Victory Charge (Ground Gosei Great)
- Gosei Yellow - Sparquake, Gosei Dynamic, Gosei Tiger, Gosei Great, Ground Gosei Great, Victory Charge (Ground Gosei Great)
- Gosei Blue - Presshower, Gosei Dynamic, Gosei Shark, Gosei Great, Ground Gosei Great, Victory Charge (Ground Gosei Great)
- Gosei Knight - Groundion, Vulcan Headder, Knight Dynamic, Knight Brothers, Gosei Ground, Ground Gosei Great, Victory Charge (Ground Gosei Great)
- As part of Super Hero Time, this episode aired alongside Kamen Rider W episode 42, The J Labyrinth/The Diamond Is Hurt.
- Pre-Break: Gosei Red
- Post-Break: Gosei Red
- This episode aired on the same day of the eighth episode of Super Sentai Versus Series Theater, featuring pt. 2 of Seijuu Sentai Gingaman vs. Denji Sentai Megaranger
- Eri nearly spoils Ground Gosei Great when the team speaks about the upcoming episode.