- Have an awful thought, Batman.
- What?
- What if Penguin really has gone straight?

6 seconds sound clip from Batman (1966) - The Penguin Goes Straight (S1E21) sitcom.

You can hear this line at 00:22:01.306 in the Blu-ray version of the TV Series episode.

Quote context

[...]

- Yes. We have taken over the Gotham amusement pier. Should be amusing.

- You... you abominable avian!

- Yes, Commissioner.

- Gotham amusement pier tonight. Penguin is tossing a party.

- Interesting.

- You better not be there, Batman. If you are spotted, I'll have to arrest you.

- It's our only hope, Robin. We'll have to catch Penguin in something crooked that he won't be able to press that warrant for our arrest.

- Have an awful thought, Batman.

- What?

- What if Penguin really has gone straight?

(Vintage amusement park)

- What do you think, Batman?

- He's with Sophia Starr and she's wearing those priceless diamonds.

- Yeah, I have a strange feeling, It's time for the kill.

[...]