- Hey, was Uncle Stuart wearing a blue suit, red tie, and tennis shoes?
- Yeah. When we last saw him.
- Then I think we found him, only he looks a little older now.

12 seconds sound clip from Scooby-Doo, Where Are You! - What the Hex Going On (S1E6).

You can hear this line at 00:08:41.914 in the Blu-ray version of the episode.

Quote context

[...]

- If there's one thing I can't stand, it's taking a bath in a haunted house.

- Whether you know it or not, Scooby, you found our first clue.

- I did?

- Sure.

- Whoever heard of a ghost needing a watchdog to scare anybody away?

- Like, you mean there isn't any ghosts?

- Well, I haven't seen any... yet.

- And we haven't seen Sharon or her uncle either.

- Hey, was Uncle Stuart wearing a blue suit, red tie, and tennis shoes?

- Yeah. When we last saw him.

- Then I think we found him, only he looks a little older now.

- Wow! I guess that ghost wasn't kidding.

- That's just about as old as you can get.

- It sure would help if we could find another clue.

- Uh-huh. I found one.

- Groovy! What is it?

- Him.

- It's the ghost!

- Ghost?

[...]