We can't afford to leave any stone unturned.
4 seconds sound clip from the Carry On Screaming! movie soundboard.
You can hear this line at 00:14:18 in the Blu-ray version of the movie.
Quote context
[...]
- Right. Erm... no. You go and look around. You're supposed to be the great detective.
- Why are we stopping here, sarge?
- He's right, you know... it is a house!
- Marvellous. But we're not looking for a house, we're looking for Doris.
- I know, but it's the middle of the woods. They might have heard or seen something suspicious.
- We can't afford to leave any stone unturned.
- What's the name of this road?
- Then we must explore... Avery Avenue.
(Bung knocking on wooden door)
[...]