7.2 1975
It's the very first Super Sentai series what made many of it's successors possible. If you want to watch the original first season of the Super Sentai series.
Kagaku Sentai Dynaman (1983)
Related
6.9 1982
It's the 6th sequel of the series from Super Sentai right after Dai Sentai Goggle-V which is the 5th sequel. If you would like to watch the super sentai series chronologically.
7.2 1984
It's the 7th sequel of the series from Super Sentai right after Kagaku Sentai Dynaman which is the 6th sequel. If you would like to watch the super sentai series chronologically.