- You figure it has something to do with King Boris?
- Maybe.

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

You can hear this line at 00:05:52 in the Blu-ray version of the movie.

Quote context

[...]

- Him again.

- We'll be right over. To the Batpoles.

- It's The Riddler. His modus operandi alright.

- I agree. Nobody else would use such a spectacular and bizarre method to flaunt a puzzle.

- What the devil is the culprit trying to tell us?

- The riddle itself is pretty basic. A person is a piece of wood when he's a ruler.

- You figure it has something to do with King Boris?

- Maybe.

- Good thinking, Robin.

- But no attempt was made to abduct or to harm him.

- Wood, ruler, king. Tsk. A chess king. The International Chess Tournament tonight!

- Twenty five thousand dollars in prize money.

[...]