Mr. Fantastic / Reed Richards (13 episodes, 1978)
Sue Richards / The Invisible Girl (13 episodes, 1978)
Ben Grimm / The Thing / Blastaar / The Mole Man (13 episodes, 1978)
H.E.R.B.I.E. / Doug / Impossible Man (13 episodes, 1978)
(13 episodes, 1978)
Doctor Doom / Karnak / Magneto / Presenter at Science Convention / Professor Gregson Gilbert (13 episodes, 1978)
Opening Narrator (13 episodes, 1978)
Gorgon / J.J. Colossal (13 episodes, 1978)
Trapster (13 episodes, 1978)
Crystal (13 episodes, 1978)
Medusa (13 episodes, 1978)