X-Men [Professor X; Cyclops; Jean Grey; Angel; Iceman; Beast]; Fantastic Four [Mr. Fantastic; Invisible Girl; Human Torch; The Thing]; Mad Thinker (villain); Awesome Android (villain)
Synopsis
Fearing that Jean is not being properly stimulated by being on a team full of boys, Professor Xavier sends her to be mentored by Invisible Girl of the Fantastic Four.
Avengers [Iron Man [Tony Stark]; Spider-Man; Hulk; Storm; Wolverine; Giant-Girl [Janet Van Dyne]]; Hank Pym; Vernon Van Dyne (Janet's father); Psyklop (villain); Puppet Master (villain)
Synopsis
During a battle with the insect-like Psyklop, Giant-Girl goes crazy and starts attacking her friends and the Avengers have to turn to Hank Pym for help.