- It's bitter... but it's a break. The first one we've had. We'll have to use it.
- You're right. Only how?

9 seconds sound clip from Batman (1966) - He Meets His Match, the Grisly Ghoul (S1E16) TV Series.

You can hear this line at 00:07:42 in the Blu-ray version of the movie.

Quote context

[...]

- Is it possible, Batman?

- Steady, Robin. Steady, old chum.

- But how can it be?

- It's an old story, I'm afraid. Old as Eve and the apple. That snake, the Joker must have promised her some baubles. Led her astray.

- But what are we gonna do, Batman?

- It's bitter... but it's a break. The first one we've had. We'll have to use it.

- You're right. Only how?

- Let's see, today is a school holiday, isn't it?

- Where does that cute little trickster happen to be hanging out?

- I know. The Easy Living Candy Store. It's on East 3rd, two blocks from school.

- Get set, Robin. Get set for an ugly job. No, correction.

[...]