Adrian Monk: We have all the pieces. The "who," the "why," and the "how."
Commander Nathan Whitaker: Is that right?
Adrian Monk: This is the how. It's a firecracker. And these ashes are from a cigarette.
Steven Albright: We found them in the vent behind the door.
Adrian Monk: It happened right here in this room a few minutes before the second drill. You forced Jason Pierce to drink some vodka then you shot him. You executed your friend in cold blood with a homemade silencer. Nobody heard a thing. You used a cigarette as a fuse, which gave you about five minutes to get back to the bridge. You hid it inside that vent, you figured it was the one place they wouldn't look. It was a perfect alibi. You were in the hallway with witnesses when they heard what they thought was a gunshot. All you had to do was slip the key into his pocket when no one was looking.
Natalie: We found a thumbprint on the inside of that vent.
Steven Albright: I could fax it to NCIS. It would take about a half an hour.
Commander Nathan Whitaker: That won't be necessary, Lieutenant.
Steven Albright: In that case, sir, I'm relieving you of your command and confining you to quarters.
Commander Nathan Whitaker: Congratulations, Detective Monk. I hope the rest of the Navy does its job as well as you do yours. [both salute]