It's a little plot I hatched in prison. Wait and see.
6 seconds sound clip from the Batman (1966) TV series - Fine Feathered Finks (S1E3).
You can hear this line at 00:14:02 in the Blu-ray version of the movie.
Quote context
[...]
- Are you sure you haven't gone stir crazy?
- Why, you, birdbrain. How dare you mock me on the eve of my greatest triumph?
- Do you really mean the Batman's gonna plan our caper?
- Yes, my fine feathered finks.
- It's a little plot I hatched in prison. Wait and see.
- The Batman and the Penguin are going to be partners in plunder.
- What's that? Batman and the Penguin partners in plunder?
- Someone must have flipped his fine feathered wig.
- A patrolman had just called in.
[...]