On King of the Hill, Bill Dauterive often pines about his ex-wife Lenore, but we don’t ever see her until she makes in appearance in season 5. The episode was Hank and the Great Glass Elevator. She is never seen again in the series after this appearance.
I’m probably wrong, but I don’t recall ever seeing Sarah, the phone operator on the Andy Griffith Show.
In Star Trek, the Breen, Dominion, and I’m sure several others are mentioned long before they are ever seen.
I’m well aware of what terms the British use, but it’s not a British show so it’s divided into seasons, not series.
There are a whole slew of reasons why series might be an appropriate term for British shows (their TV industry is completely different) but they don’t apply to American shows.
And it’s not like I ripped anyone a new one. I made a simple informative statement. If no one tells them they’re using the terms ‘wrong’ when talking about American shows, they’ll never learn. 
Since it’s off topic, that’s the last I’ll say on the matter in this thread, I don’t want to totally derail things.
This is a slight hijack, but along the same lines, you never see the guy who does the announcements in MAS*H. This has always bugged me, because he’s clearly broadcasting from Radar’s (later, Klinger’s) office, since that’s where the P.A. system is. Yet we never see him. Or, for that matter, know who he is. He seems completely out of the continuity of the show, because there’s nobody among the regular or even the semi-regular cast* he could be.
Don’t tell me the name of the actors who did the voice – i know it’s not conjured out of thin air. The point is that there’s nobody on the show it could be. After 12 years, we should have run into him walking out of Radar’s office, or somebody should have commented about what X said over the speaker, or something.
*like Nurse Kellye
So if I want to talk about Dr. Who, will you complain if I refer to seasons rather than series?
It looks like someone’s blowing on his face with a high-pressure air hose.
Newman on Seinfeld was only referenced at first, then he showed up. There was an episode early on when he was threatening suicide and you hear him. The voice is Wayne Knight’s, but you didn’t see him.
I just don’t remember how long into the show it was before he made an actual appearance.
However, we never got to see Kramer’s often mentioned friend: Bob Saccamano
Well, did Charlie, of Charlie’s Angels ever make an appearance?
How about Kramer’s friend, Bob Sacamono?
Mrs Slocombe’s pussy in Are You Being Served?
On Fringe, William Bell isn’t revealed to be Leonard Nimoy until the end of the second season.
The orginal voice was Larry David, it was re-recorded for syndication.
It happened. There was also an episode where she got a job in the restaurant upstairs from Cheers. We heard her voice calling to Norm, but we didn’t see her.
In Heroes Season 1, Linderman is mentioned all season, but didn’t appear (in the person of Malcolm McDowell) until Episode 18.
In Quantum Leap, Gooshie, Tina and Ziggy are frequently mentioned, but not seen until a later episode where Sam and Al changed places.
Wow. Just … wow.
Just so I know for the future, do I have to stick to American spellings when referring to American shows as well or is it just American definitions of words?
It’s a matter of how you were shooled.
shooled?
Blossom’s mother Maddy Russo, finally seen as played by Melissa Manchester.