Monk, Season 5

Natalie:
You can't swim?

Monk:
To be honest, I don't know. I mean, I know how... all right, I took a correspondence course.

Natalie:
You learned to swim by mail?

Monk:
They sent me a little diploma! And, I've got this.

[He gives her a little card from his wallet.]

Natalie:
"Swimming Fundamentals: Don't panic; Breathe normally; Flutter kicks..."

Monk:
Can I have that back, please?

Natalie:
Why would you even take the course? You never go in the water.

Monk:
Hello, tsunamis?