The professor is evil. The professor must be...
9 seconds sound clip from the Dimension X - Almost Human by Robert Bloch classic radio drama series episode.
You can hear this line at 00:10:18 in the radio play.
Quote context
[...]
- Oh, my dear, you know me better than that. What makes you think I'd teach a child anything evil?
- I never taught you anything evil, did I, darling? Well, did I?
- Yes. Yes, you did. Only you taught me to like it.
- Now, Junior, write on the blackboard: 'My name is Junior.'
- People are evil. Evil must be destroyed.
- The professor is evil. The professor must be...
- I warned you to keep out of the nursery, Professor.
[...]