Insanity Claus (Wings)

"Insanity Claus" is the fourth Christmas episode of the NBC sitcom Wings, aired in the show's sixth season.

Synopsis
On Christmas Eve, when Antonio buys Helen's last jelly donut, Bob, the new air traffic controller, pulls out a gun and takes him hostage. Matters for him only get worse when it is revealed that his new girlfriend is also Bob's wife. Joe is finally able to talk Bob into surrendering his gun, but the others are not very appreciative of the means by which he does it.