Who knows what evil lurks.
4 seconds sound clip from Batman (1966) - An Egg Grows in Gotham (S2E13) TV Series.
You can hear this line at 00:05:36 in the Blu-ray version of the movie.
Quote context
[...]
- Dire news, Batman. Egghead is back with a carton full of crime.
- We'll be right there. To the Batpoles.
- Why go to all that trouble to steal the city charter?
- He's a tough egg, Batman, the smartest man in the world.
- The second-smartest man in the world.
- Present company excepted, of course.
- He's assuredly the smartest villain we've ever faced.
- Is there any evidence left at the scene of the crime?
- None, Boy Wonder. Frankly, we're stumped.
[...]