Himitsu Sentai Goranger: The Bomb Hurricane! (1976)

Himitsu Sentai Goranger: The Bomb Hurricane! is the fourth theatrical films based on Himitsu Sentai Gorenger. It was originally shown on July 22, 1976 (between Episodes 56 and 57 of the TV series) as part of the Toei Manga Matsuri film festival. It was the only Gorenger film that was a completely original work and not a theatrical version of a TV episode

It's the first sequel of the series from Super Sentai and the 2nd Season. Himitsu Sentai Goranger being the first prequel and first season of the Super Sentai Series. If you would like to watch the super sentai series chronologically.