Crazy people often think that they're a spy, or are in the CIA. But what if you actually are in the CIA -- and then people think that you're crazy?

[Spoiler alert.]

That's the situation on 'Chuck' (Mon., 8PM ET on NBC). Chuck (Zachary Levi) starts having strange dreams, and is committed to a mental hospital for CIA spies. But while he's there, the bad guys attack. Chuck attempts to use martial arts skills to fight the villains. But unfortunately, he's already been drugged, so his efforts are a little ... off.

At this point, "Merlin" -- another patient in the hospital -- suddenly arrives to save the day. Will Merlin take down the bad guys? Well, no, actually. He won't.