There's a great deal of hidden significance in the fact that just one of the cats is scratched out.

7 seconds sound clip from Batman (1966) - The Purr-fect Crime (S1E19) TV Series.

You can hear this line at 00:04:55 in the Blu-ray version of the movie.

Quote context

[...]

- And we believe this is just the first of the planned robbery.

- Good thinking, commissioner.

- Obviously, the Catwoman would not be satisfied with only this.

- No, I'm certain this only the first stitch in the large tapestry of crime.

- And the clipping?

- There's a great deal of hidden significance in the fact that just one of the cats is scratched out.

- Gosh, I wish Mark Andrews, was here. I bet he could give us some more info.

- And indeed I can.

- Batman, we know that you would want Mr. Mark Andrews. We called him to come down to the headquarters.

- How do you do, Mr. Andrews?

[...]