Gigantor - Season 1 - Eps 25: Trap At 20 Fathoms!
Dr. Brilliant is abducted by a flying saucer and taken to King Soress' secret base. There he's forced to work with another kidnap victim, Professor Pluto, to make new atomic weapons.
About Gigantor

Title: Gigantor
First Air Date: 1963-10-20
Last Air Date: 1965-01-06
Status: Ended
Rating: 7.4/10 (from 5 votes)
Language: JA
Seasons: 2
Total Episodes: 78
Network: Fuji TV
Genres: Animation, Sci-Fi & Fantasy
Production Companies: Unknown
Synopsis
Gigantor is an American adaptation of the anime version of Tetsujin 28-go, a manga by Mitsuteru Yokoyama released in 1956. Jimmy Sparks controls a gigantic, powerful robot and uses it to fight crime. It debuted on U.S. television in 1964. As with Speed Racer, the characters' original names were altered and the original series' violence was toned down for American viewers.
Cast

Kazue Takahashi
Jimmy Sparks / Kaneda Shotaro

Kosei Tomita
Inspector Blooper / Captain Otsuka

Minoru Yada
Dr. Bob Brilliant / Professor Shikishima

Yuzuru Fujimoto

Fuyumi Shiraishi

Toshio Andou
Dick Strong / Murasame Kenji