I'll go after them. After the Mad Hatter.
5 seconds sound clip from Batman (1966) - Batman Stands Pat (S1E14) TV Series.
You can hear this line at 00:03:47 in the Blu-ray version of the movie.
Quote context
[...]
(In french) Yes, look. He's alive!.... I hope.
- Curses. My super mesmerizer is on the brink.
- I'll go after them. After the Mad Hatter.
- Robin!
- Batman!
- Robin!
- Well, I'm used to seeing you do the impossible. But getting out of that plaster tomb was impossible.
[...]