Monk (2002)

S4E9 Mr. Monk and the Secret Santa

During the festive police department Christmas party, a detective tragically collapses after consuming port laced with poison, meant for Captain Stottlemeyer. With the holiday spirit overshadowed by this shocking incident, Monk is called into action to unravel the mystery. Can he uncover the identity of the killer before the holiday cheer is permanently tainted?