There must have been someone.
4 seconds sound clip from the Peter Pan (1953) movie soundboard.
You can hear this line at 00:10:14 in the Blu-ray version of the movie.
Quote context
[...]
- Well, Wendy said something about a shadow, and I...
- You don't say. Goodness gracious, whatever shall we do?
- Sound the alarm! Call Scotland Yard!
- There must have been someone.
- Mary, of all the impossible, childish fiddle-f addle. Peter Pan indeed.
- How can we expect the children to grow up and be practical when you're as bad as they are.
- No wonder Wendy gets these idiotic ideas.
- Over there, Tink, in its den. Is it there?
[...]