Besides, she really didn't leave them behind. She probably, expected to return.

9 seconds sound clip from Batman (1966) - Better Luck Next Time (S1E20) TV Series.

You can hear this line at 00:13:27 in the Blu-ray version of the movie.

Quote context

[...]

- Tell the commissioner we'll be in touch.

- Commissioner, we'll be in touch.

- Over and out and good luck... To all of us.

- I don't understand why Catwoman would leave these behind. Especially, after going to such great lengths to steal them.

- Perhaps, she had another use for them.

- We'll find out when we examine.

- Besides, she really didn't leave them behind. She probably, expected to return.

- They've got to be the answer.

- We've tried everything. The Metal Analyzer, the Spectroscope. Both negative. No hidden compartments.

- I just don't understand it.

- Look at the back of this cat, Robin, what do you see?

[...]