We're all friends here, take off my mask.
2 seconds sound clip from Superman (1948) - The Reducer Ray (Chapter 3).
You can hear this line at 00:06:37.864 in the Blu-ray version of the episode.
Quote context
[...]
- I don't want that test held until I get a scientist out there to observe it.
- Well, how do you figure on stopping it?
- You have apparatus to create negative rays.
- I'll expect you to the delay it until it suits my convenience.
- We're all friends here, take off my mask.
- I think that Superman has taken on a job even he won't be able to accomplish.
- Word reached me that you wanted to see me, Mr. Secretary, and I came at once.
- You've heard of Dr. Graham, our distinguished nuclear scientist.
[...]