What? Basil on the case!
5 seconds sound clip from the The Great Mouse Detective movie soundboard.
You can hear this line at 00:36:47 in the Blu-ray version of the movie.
Quote context
[...]
- You see, it was like this. I was in the toy store getting uniforms when I heard...
- I had baby bonnet, girl in bag and Basil chased me.
- Oh, my dear Fidget. You have been hanging upside down too long.
- You mean, you're not mad? I'm glad you're taking it so well.
[...]