Castle, Season 2

[After Castle leaves, Beckett turns on her computer, only to find a snapshot of her modeling for tennis agency]

Ryan:
Looking good, Detective Beckett.

[Looks over and sees Ryan and Esposito grinning at her.]

Beckett:
How did you guys…

Ryan:
We're detectives

Esposito:
Called your dad.

Beckett:
[Rising up and walking over to them] Okay, okay, you guys have had your fun. I was 17 and I thought that modeling would be an easier way to make money than waitressing.

Esposito:
Right.

Beckett:
It was one summer, no big deal. [Turns and walks away, but snaps her fingers and turns back] And if you guys tell Castle about this, I will kill you.