Exactly, it's my guess that our puzzling friend will try to steal it.

7 seconds sound clip from Batman (1966) - A Riddle a Day Keeps the Riddler Away (S1E11) TV Series.

You can hear this line at 00:07:01 in the Blu-ray version of the movie.

Quote context

[...]

- I saw that in the papers. He's going to present the Museum of Fame with a doll-sized replica of the Queen of Freedom.

- Queen? A queen can be a ruler. That's it.

- What queen? There is no queen, the king ain't married.

- There will be tomorrow. A new queen of beauty.

- They're gonna crown her with a priceless diamond and emerald tiara.

- Exactly, it's my guess that our puzzling friend will try to steal it.

- Ah, now, we're getting somewhere. I'll have that place blocked so tight.

- On the contrary... I think we should let The Riddler steal the tiara.

- Ladies and gentlemen, before I announce this year's winner, I shall like to introduce you to last year's Miss Galaxy.

- She is Jackie Sands.

[...]