In the "Captains Outrageous" episode, Father Mulcahy uses the word "nerd" while talking to Col. Potter about his promtion to Captain. That word wasn't a 1950's word! It was "Happy Days" that first used the word "nerd."
nerd: 1951, U.S. student slang, probably an alteration of 1940s slang nert "stupid or crazy person," itself an alteration of nut. The word turns up in a Dr. Seuss book from 1950 ("If I Ran the Zoo"), which may have contributed to its rise. Adjective nerdy is from 1978.
You're welcome, and thank you for prompting me to look it up. I always like finding out new things about our strange and ever-expanding language. I suppose that makes me something of a nerd.