You may speak freely. No one's listening in. I'll be there.

8 seconds sound clip from Batman (1966) - Rats Like Cheese (S1E8) TV Series.

You can hear this line at 00:11:01 in the Blu-ray version of the movie.

Quote context

[...]

- Absolutely out of the question. As protector of our city, I cannot allow you to deliberately jeopardize your very life.

- Over me dead body you'll go.

- Sorry, hes is the idol of millions of impressionable young lads who look up to him. He must live to inspire the youth of today who will be the men of tomorrow.

- I accept your terms. Where and when do we meet?

- Alone?

- Alone.

- You may speak freely. No one's listening in. I'll be there.

- This is one time I'll have to go out alone. I gave my word.

- A hot flash for the chilly Mr. Freeze.

- Will Robin just stand by?

- If Muhammad won't come to the mountain, Master Dick, the mountain must come to Muhammad.

[...]