Hm-hm. You're too late, Batman. You're too late.
5 seconds sound clip from Batman (1966) - The Bat's Kow Tow (S2E30) TV Series.
You can hear this line at 00:03:22 in the Blu-ray version of the movie.
Quote context
[...]
- Call Chief O'Hara and have him pick this bounder up.
- All right, Belgoody, tell me everything.
- Every? Well, I was born in Youngstown of poor, but honest parents.
- Come off it, Belgoody. You're pulling my boot.
- Hm-hm. You're too late, Batman. You're too late.
- Their voices? So that's it. What a fiendish plan.
- Chief O'Hara and his men will be right over.
- We must get to Gotham City Town Hall immediately, Robin.
[...]