1. He has one of the following names: Kris, Chris, Criss, Nick, Nicholas, or (rare, but possible) Klaus.
This is your first sign. If he’s deep undercover, he might go by Christopher, but just wait until you’re most of the way through the movie. It’s the perfect opportunity for him to wink at one of the characters — ideally, a child who is pure at heart — and say something like, "But my friends call me Kris."
2. Is there no one in the movie with one of these names? You’re not in the clear yet: look out for the deep fake.
Perhaps his name is something ordinary, like Kevin Ringle. You might look right past him.
Just a regular guy named Kevin, you’ll think. But just wait until the moment when he writes his name on a sign-in sheet at the local clinic where he volunteers. Now follow the camera zooming in. He’s going to sign his first initial and last name. That’s right: “K. Ringle.”...