He'd come if he could be sure of killing us.
3 seconds sound clip from the Robot Monster (1953) movie soundboard.
You can hear this line at 00:59:02.372 in the Blu-ray version of the movie.
Quote context
[...]
- Ro-Man's... Ro-Man's got her!
- Roy's dead... and nothing can be done. Nothing.
- Maybe one of us could lure him out for a moment, and then the others could run in and grab Alice.
- That's easier said than done.
- He'd come if he could be sure of killing us.
- That might work! There's no time to lose!
- Suppose I were Hu-Man. Would you treat me like a man?
[...]