I am the Electric Human Stronger!!
S5:E1
1975
IMDb
The first episode of Kamen Rider Stronger. Unlike previous Kamen Rider Series premieres, and indeed the majority of those that would follow, it introduces the protagonist as already a Kamen Rider fighting evil, instead of showing him being thrown into the conflict and becoming a Rider. Stronger and Tackle's origin would be shown in the second episode.