Some of us are used to the idea of an actor getting a role and, you know, acting the part. We’ll even accept a stunt double for scenes where the actor needs to jump out of a plane. But for the most part, if we’re watching Gary Busey we want to see Gary Busey. Wait, why do we want to see Gary Busey again? As it turns out, we’re not always watching who we think we’re watching, and that happens much more often than we realize. There have been plenty of times when actors were swapped out, and us in the audience never even noticed.