- Where is he?
- Who?
- Calvin Klein.
- Who?

3 seconds sound clip from the Back to the Future Part II movie soundboard.

You can hear this line at 01:25:14.326 in the Blu-ray version of the movie.

Quote context

[...]

- No, Doc, not me. The other me. The one that's up on stage playing Johnny B. Goode.

- Great Scott! Your other self will miss the lightning bolt at the clock tower, you won't get back to the future, and we'll have a major paradox!

- Wait, wait, wait. A paradox? You mean one of those things that can destroy the universe?

- Precisely!

- Marty, you have to stop those guys at all costs, but without being seen by your other self or your parents.

- 10-4.

- What the hell? (3)

- Where is he?

- Who?

- Calvin Klein.

- Who?

- The guy with the hat, where is he?

- Oh. He went that way.

- I think he took your wallet. I think he took his wallet.

- Go, Johnny, go, go, go. Johnny B. Goode

- Go, go. Go, Johnny, go, go. Go, Johnny, go, go, go. Go, Johnny, go, go. Go, Johnny, go, go, go. Johnny B. Goode.

[...]