Avengers Assemble: Season 2, Episode 4 - ProjectFreeTV

2 - 4: Ghosts of the Past

Red Skull has information that could help the Avengers save the world from Thanos, but an intruder kidnaps Skull before they can retrieve it. Cap discovers that the trespasser is none other than his old partner Bucky Barnes, now the Winter Soldier, who's back and seeks revenge.