Dear me. And I thought, uh, I thought I discovered the decisive clue. This, uh, book of matches, sir.

11 seconds sound clip from Batman (1966) - A Death Worse Than Fate (S1E10) TV Series.

You can hear this line at 00:10:32 in the Blu-ray version of the movie.

Quote context

[...]

- I fail to do so because of my addiction to a certain television program.

- Listen, Alfred, rid yourself of guilt.

- That's right, Alfred.

- Aunt Harriet's fine now.

- She's more than fine.

- If it hadn't been for her mishap, I wouldn't have deduced the criminal's identity.

- What? You know?

- Dear me. And I thought, uh, I thought I discovered the decisive clue. This, uh, book of matches, sir.

- The Gnome Book Store.

- Where did you find this?

- Just now, sir. On the staircase.

- They must've fallen out of Mrs. Cooper's pocket when we helped her upstairs.

- I had hoped that they might indicate the whereabouts of the felon's lair.

[...]