NCIS, Season 11

[McGee's work station, including his desk, computer and chair, has been wrapped in plastic wrap]

Abby:
We're dealing with a sadistic evil genius.

[Tony arrives at work and cheerily enters the squad room]

McGee:
[notices Tony] I think you have that equation right?

Tony:
[catches sight of McGee's desk] OH! What have we here! about safe agent-ing seriously. [chuckles] That's a little overboard McRibbed.

McGee:
[unamused] You've had your fun Tony. Unwrap it.

Tony:
Oh. Gosh. I'm flattered. But unfortunately, that prophylaxis is not the work of yours truly.

Abby:
Then who's work is it?

Tony:
Who knows? The Great Pumpkin? Headless Horseman? Perhaps the Ghost of Halloween Past? Mike Franks? Possibilities are endless.