Tony Stark (Robert Downey Jr.) agrees to work on a machine that would allow the Avengers to time travel — on one condition. He has started a family in the last five years and thus does not want ...

And because the stones are the only things powerful enough to reverse Thanos' actions and the only place to get them is in the past, the Avengers use their time machine to steal the gems at three ...

Avengers: Endgame follows the heroes who survived ... Naturally, the hero mentions Hot Tub Time Machine, but the note made fans pause. The pause came courtesy of Sebastian Stan.

As promised to The Ancient One, Captain America uses the Avengers' time machine to return the Infinity Stones (plus Mjolnir) to their place in the timeline. But he returns as old Steve Rogers ...