Well, the explanation is quite a simple one.
2 seconds sound clip from the Fiend Without a Face (1958) movie soundboard.
You can hear this line at 00:23:13.110 in the Blu-ray version of the movie.
Quote context
[...]
- Are you collating his material?
- I do most of it. He dictates on this. I edit the tapes and prepare the draft manuscripts.
- The professor must be quite a guy. Thought control, cybernetics, all that stuff.
- Strange, isn't it, finding a man like that here in Winthrop?
- In these uncivilized backwoods, I think you were going to say.
- Well, the explanation is quite a simple one.
- Professor Walgate had a stroke about five years ago. He's retired now.
- I don't know. If it is, he'll have Dr. Bradley after him.
- Dr. Bradley said no more overwork or excitement.
[...]