- How are we going to open it?
- We'll have to break the case.

7 seconds sound clip from Batman (1966) - The Yegg Foes in Gotham (S2E14) TV Series.

You can hear this line at 00:11:05 in the Blu-ray version of the movie.

Quote context

[...]

- The big question is, where are Batman and Robin?

- Even though they've been banned from the city limits, all Gotham City is hoping for them to help us in our hour of need.

- Things may have gotten somewhat out of hand, Dick.

- Why don't we take a nice drive into the city?

- Is that wise, sir?

- We have no other choice.

- How are we going to open it?

- We'll have to break the case.

- Why don't you use the Batbeam in the spare utility belt you wear?

- If I did, Egghead might suspect Batman. No, we'll use ordinary means.

- They fell into the trap. Oh, I am egg-static. Ha-ha-ha.

- Calling all cars. Calling all cars. Be on the lookout for Batman and Robin in the vicinity of the city hall.

[...]