After Hulk and Black Widow defeat Abomination, Hulk is ambushed by HYDRA Agents and regressed to Bruce Banner enough to be captured. Upon alerting Captain America and Iron Man upon trailing the HYDRA Agents to Siberia, Black Widow discovers that Baron Strucker has reactivated the Red Room program where she meets his student Yelena Belova. Black Widow also discovers that Baron Strucker is using the Winter Soldier program to turn Hulk into the Winter Hulk.
- Hawkeye, Falcon and Thor do not appear in this episode.
Appearing in "Seeing Double"
- Captain America (Steve Rogers)
- Iron Man (Tony Stark)
- Black Widow (Natalia Romanova)
- Hulk / Winter Hulk (Bruce Banner)
- Baron Wolfgang von Strucker (First appearance)
- Black Widow (Yelena Belova) (First appearance)
- Black Widow Zombies (Deceased)
- Abomination (Emil Blonsky)
- Winter Soldier (Bucky Barnes) (Mentioned)