As the final film of an 11-year epic, Avengers: Endgame pays tribute to some of the most important moments in the MCU timeline. Thanks to the convenient discovery of a form of time travel, Earth's Mightiest Heroes go back to a few of their best movies - even catching a glimpse of some of their biggest moments from an outside perspective. In some cases, they change the course of history; in others, they're simply voyeurs in their own lives.
There are plenty of Easter eggs for MCU fans sprinkled throughout Endgame's time-travel sequences - but more importantly, the moments revisited from the MCU's previous decade often give new meaning to existing scenes. In some cases, we even get a look at what took place when our attention was diverted elsewhere - the moments in between the series' famous scenes. For example, what happens after Loki's detainment, and just what was Thanos up to during his hunt for the Infinity Stones.
It's worth noting that there are major Endgame spoilers below, so keep that in mind as we take a fresh look at the MCU's suddenly revitalized past.