Michael Corvin

Actually, there are adults in:
This is America, Charlie Brown
It's the Pied Piper, Charlie Brown

As far as parents or teachers though, you are correct. I'm thinking they showed the cat at one point as well.

Chew

nateman

Another M*A*S*H one: I don't think we ever saw Hawkeye's father. I have all 11 seasons on DVD & have watched every single episode exept for the "Goodbye, Farewell & Amen" series finale. If he appeared in the finale could you please do a spoiler tag, because I have never (Yeah, I live under a rock) seen the final episode of M*A*S*H.

rfduncan

George only thought he saw Cousin Jeffrey across the street, but he didn't have his glasses. We later learn that he had in fact seen a police officer kissing her horse.

Nope.

Let's not forget Karen Walker's husband Stanley on Will & Grace!

dx23

Dr. Claw on Inspector Gadget
Plastic Man on Justice League Unlimited

Jericho

I always think of someone like Robin from Magnum, P.I.

rfduncan

Except don't we learn at the end of the series that ?

Groucho

No, we learn just the opposite.

DVD Josh

5/5. Classic groucho.

Charlie Goose

Jan Brady's made-up boyfriend. Doesn't really fit the category because he wasn't a real character.

GeorgeP

Thanks for the corrections on M*A*S*H, all. I'd forgotten everyone who was in the "Home Movies" episodes except for Radar playing his mom.

One last M*A*S*H mention has to go to Radar's/Klinger's hook-up for skag, Sparky.

Don't forget the inimitable Sam Bailey from "Mayberry RFD." He's barely mentioned by Andy or anyone else, yet 'everyone knows him' when he just shows up one day to take charge.

And a silly, yet obvious mention goes out to "Mork and Mindy"'s Orson.

johnnysd

Mrs. Coulumbo is the one that I think of right away.

gfoots

Why hasn't anyone mentioned The Gooch from Diff'rent Strokes?

Jimmy James

We did see Juanita in episode 13 of season 1 according to IMDB. It's titled Mayberry Goes Hollywood.

As to Otis, Wikipedia backs me up that he was married. We apparently see his wife in season 1 as well according to IMDB. It's episode 25 -- A Plaque for Mayberry.

Groucho

I read that as "A Plague for Mayberry" at first.

dstrauss

"Where'd you get chinese food?"
"Two words. Tino."

DeputyDave

I can't remember ever seeing Bob Kelso's wife, Enid, from Scrubs (or his gay son, either).

HotThang

I thought they did and it ended up beng a girl?

Jimmy James

Did we ever see Iola Boyland's mother on Mama's Family?

dvd182

Rambaldi on Alias is a good recent one.

Goldberg74

I was going to post the same thing... and add Elliot's brother Barry.

Coral

Jenny Piccalo from Happy Days was one of those unseen characters, until Richie and Ralph left and they were desperate to fill the gap with all sorts of characters... voila, Jenny's here!

How about George Costanza's brother? He was mentioned once but never seen, and we never heard about him again.

j123vt_99

What was the name of the character on Seinfeld that was friends with Kramer who had some crazy schemes (knew where to buy the 'rat' hat)? Bob Saccomato? Did we ever see him?

Bill Needle

Happy Days also sports my favorite "now you see him, now you don't," AKA: Let's-all-act-like-we-don't-notice-he's-gone-and-pretend-he-never-even-existed-and-look-at-people-like-they-are-crazy-for-even-asking-about-him characters, Richie's older brother Chuck. I guess with Happy Days you win some, you lose some.

Numanoid

Diane...Agent Cooper's secretary(?) in Twin Peaks.