That's all we'll need, if my calculus is correct.
5 seconds sound clip from Batman (1966) - The Cat and the Fiddle (S2E3) TV Series.
You can hear this line at 00:03:26 in the Blu-ray version of the movie.
Quote context
[...]
- What time is it? Who cares what time it is?
- Judging from the position of the sun, in just 16 seconds, we're going to have a respite.
- Don't you remember? There's an eclipse of the sun due.
- But that's only for a half-minute.
- That's all we'll need, if my calculus is correct.
- We've only got one chance, Robin.
[...]