Writer: Roy Thomas
Penciller: John Buscema
Inker: George Klein
Letterer: Sam Rosen
Featured Issue: Avengers #56
Plot Summary
The Avengers arrive at what appears to be an abandoned castle, answering a summons by their former teammate, Captain America. Little do the Avengers realize that this is in fact Castle Doom. Cap has brought them here so that they may use Doom’s time machine and travel back to the day Bucky died in order to prove once and for all that Bucky is really dead. The team leaves Wasp behind to man the controls and ensure they remain undetectable by those in the past. While in the past, the Avengers witness Cap and Bucky face off against Baron Zemo and his automatons. Everything goes as it had before until, back in the present, Wasp falls asleep. Without her constant input to the controls, the Avengers become visible and are forced to step in and fight Zemo and his creatures. In spite of their interference, the time line continues on just as it previously had and as Captain America and the other Avengers disappear back to their time, Cap once again watches those fateful events, proving with certainty that Bucky is in fact dead.
Avengers
Black Panther
Captain America
Goliath
Hawkeye
Wasp
Some Assembly Required 