Meanwhile, behind the facade of this innocent-looking bookstore, there lurks the secret workshop of a strange Albanian genius... Eivol Ekdal.

16 seconds sound clip from Batman (1966) - Zelda the Great (S1E9) TV Series.

You can hear this line at 00:10:42 in the Blu-ray version of the movie.

Quote context

[...]

- Uh, excuse me, sir. Would you and Master Robin be departing soon?

- Oh, indeed, we will.

- Thank you, sir. Then I'll go and get the vacuum cleaner.

- Looks perfect, Batman.

- Yep, it's all there. Just the way I dictated it.

- Oh, boy. I'll bet somewhere in Gotham City there's one really shook lady crook.

- I hope so.

- Now to make this planted story sprout.

- Meanwhile, behind the facade of this innocent-looking bookstore, there lurks the secret workshop of a strange Albanian genius... Eivol Ekdal.

- Sorry to be late, Eivol.

- Counterfeit you bring me. To me, Eivol Ekdal, worthless counterfeit. Look.

- How could I know, Eivol?

- How could I know, Eivol? (2)

[...]