Fantastic Four: World's Greatest Heroes - Season 1 - Eps 3: Doomsday
Reed stands accused of purposefully exposing Susan, Johnny and Ben to the cosmic rays that have transformed them into the Fantastic Four. While they're distracted by this turmoil, Dr. Doom strikes!
About Fantastic Four: World's Greatest Heroes

Title: Fantastic Four: World's Greatest Heroes
First Air Date: 2006-09-02
Last Air Date: 2007-10-20
Status: Ended
Rating: 7.5/10 (from 89 votes)
Language: EN
Seasons: 2
Total Episodes: 26
Network: Cartoon Network
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy, Kids
Production Companies: MoonScoop, Marvel Entertainment
Synopsis
Mr. Fantastic, the Invisible Woman, the Human Torch, and the Thing battle some of their greatest foes, including Doctor Doom, Ronan the Accuser, the Multiple Man, and Mole Man.
Cast

Hiro Kanagawa
Mr. Fantastic (voice)

Lara Gilchrist
Invisible Woman (voice)

Christopher Jacot
Johnny Storm (voice)

Brian Dobson
Ben Grimm (voice)