It's a new explosive that makes no noise. It's called silentmite.
— Catwoman (Julie Newmar)
5 seconds sound clip from Batman (1966) - Scat! Darn Catwoman (S2E41) TV Series.
You can hear this line at 00:16:08 in the Blu-ray version of the movie.
Quote context
[...]
- Now, here's the secret entrance to the place.
- We're standing in front of the rear door and the entrance is four feet to the left.
- I don't see anything, Catwoman.
- You're not supposed to. That's the idea. Hammer.
- Get back. Get back. Get back. Get down. Get down.
- It's a new explosive that makes no noise. It's called silentmite.
- Fill up those sacks with money. Don't take anything under a nickel.
- Robin, you escaped. A lucky star's above you.
[...]