Radar.
3 seconds sound clip from the The Big Knife (1955) movie soundboard.
You can hear this line at 01:05:23 in the Blu-ray version of the movie.
Quote context
[...]
- If I take one more drink, I'll see a snake.
- Take a light one. Don't be silly.
- All right, you masochist. Give me a scotch and soda.
- How did you know I was at Monty's party?
- Radar.
- Oh, you're a faker. You're very sweet, but I don't trust you.
- Why don't you like me anymore?
- Oh, I haven't seen you since that very day I sat in this here chair with you and your agents.
[...]