Twenty years ago when your comrades voted to return to Earth, you sent your secret id out to murder them.
9 seconds sound clip from the Forbidden Planet (1956) movie soundboard.
You can hear this line at 01:31:36 in the Blu-ray version of the movie.
Quote context
[...]
- You've got to listen. We don't have much time.
- Here. Here's where your mind was artificially enlarged.
- Not quite realizing it, of course, except maybe in your dreams.
- What man can remember his own dreams?
- At least when our ship was approaching from space, you remembered enough to warn us off.
[...]