Iron Man - Season 2 Episode 11 Hulk Buster
Overview: One of the Mandarin's missing rings creates a time rift and Julia gets sucked in. Iron Man manages to recover the ring with Bruce Banner's help, but before Julia can be saved, The Leader steals it and now possess two of the Mandarin's rings. The Leader plans to travel back to before the gamma bomb detonation and gain the power of the Incredible Hulk.