What If…? changes how time travel can work in the MCU

What If…?’s Doctor Strange episode has, predictably, played with time. But it’s gone even further than that – and introduced a concept that could have far-reaching consequences for the rest of the MCU.

In the first act of the episode, a frenzied Doctor Strange continually goes back in time to try and save Christine. No matter what he does, she keeps on dying: car crash, heart attack, and a hold-up at a pizzeria are just some of the ways Rachel McAdams’ surgeon shuffles off this mortal coil.