If you've seen Thor: The Dark World, you'll be aware that Tom Hiddleston's arc as Loki is… intriguing, to say the least.
So we decided to find out just what happened with those much-discussed reshoots earlier this year.
We asked Marvel Uber-Producer Kevin Feige what those reshoots involved, and to find out what he had to say, click the video below.
But be warned, there are spoilers in the video, so make sure you go and see the film before you click play.
Thor: The Dark World is in cinemas now.
Have you seen the film? What did you think? Tell us below!