It's this case that's driving me mad. We're up against a blank wall.

7 seconds sound clip from Batman (1966) - Zelda the Great (S1E9) TV Series.

You can hear this line at 00:06:50 in the Blu-ray version of the movie.

Quote context

[...]

- The same strange pattern every year. Precisely a hundred thousand each April 1st.

- Glory be, I've got it. It's to pay his income taxes.

- A loyal taxpayer stooping to criminal methods?

- Uh, sure, when you put it that way...

- I fear you're growing cynical. The notion of a faithful taxpayer robbing a bank is clearly ridiculous.

- It's this case that's driving me mad. We're up against a blank wall.

- Not even a single lead.

- Right, so what do we do in such a case?

- We make a lead.

- Exactly

- Make a lead?

- In heaven's name, Boy Wonder, how?

- Don't worry. Batman will figure it out. Won't you, Batman?

- Operator, this is Batman speaking. Get me the editor of the Gotham City Times.

[...]