Episode 33
Amasso and Ikima, who were imprisoned for treason, escape from prison to ask for forgiveness by defeating Jeeg. They planted a bomb in Hiroshi's car that participated in the race, disguised as Don and Pancho and rampaged with Mechadon. The bomb will explode if the car fall below 80 km/h, so it must removed while driving. Even the robot beast and the hijacked Mechadon appeared...
Aired 30/05/1976EP 33 - Episode 33

Koutetsu Jeeg
Hiroshi Shiba is an outstanding car racer whose father is assassinated upon the discovery of the Bronze Bell from an ancient civilization. This Bronze Bell is coveted by Queen Himika who comes from that ancient era; the Yamatai Kingdom, and whose ambitions are to seize the Bell and dominate earth.
Hiroshi is left with a few items from his father which would enable him to morph into a full sized mecha warrior, the Steel Jeeg. With these abilities and the help of his father's brain implanted in a computer and his assistance Miwa "Micchi" Uzuki, they set out to neutralize Himika's plans of world dominion.