Thank you thank you thank you!
Roseanne again:
Beverly: I’m selling my share of the restaurant.
Roseanne: Are you crazy? You’ll never find a buyer in this market.
Beverly: I already did. It wasn’t hard.
Camera focuses on Leon, eating that sandwich. The audience laughed so hard that it was a minute before Martin Mull could say his line: She kept going down on the price. I couldn’t say no.
Boom! Seconded. The stove top scene could also be added to the list of many from this great show.
Lost : “Dude, you don’t know about the polar bears?” Just one throw away line, but it sums up the nature of the show and us fans perfectly.
That 70’s Show: Red, high on pot-brownies, “You could literally cruise the vista…”
Ren and Stimpy: Spaaace Maaadness!
You mean like this?
RR
The Wire - Girl goes into a hardware store and buys a nail gun.
Sopranos - Tony at his happiest of the series. When he is feeding the ducks in his pool during the first episode.
The Practice - Bobby at his most realistic and emotional state. Where he is pacing up and down before his trial while smoking a cigarette. I will always remember when he says “you think defending the guilty is tough, try defending the innocent.”
Buffy - Buffy kisses Angel and burns him with her cross.
Angel - Illyria: Would you like me to lie to you now?
Wes: Yes. Thank you, yes.
Firefly - In “Ariel” when Jayne doesn’t want the rest of the crew to find out what he did and asks Mal to make something up.
Seinfeld - Kramer’s “I’m out” as he slams his money on the table.
Friends - After Ross and Rachael kiss they show the guys and the girls discussing it. The girls go over every detail, while with guys it was:
Ross: So then I kissed her.
Joey: Tongue?
Ross: Yea.
Joey: Cool.
Battlestar Galactica:
Bill Adama believe Lee is dead. When he sees him for the first time, discovering he’s alive, there is this pause. Lee acts all formal, but Bill runs up and hugs him.
Whenever Bill Adama shows his humanity, that show shows us its greatness.
Very early Roseanne–11 year old Darlene has a sleepless night and keeps Roseanne awake. Her parents discussing it with her:
Roseanne: Your father should never had let you watch that horror movie.
Darlene: The horror movie didn’t keep me awake.
Dan: Are you worried about the basketball game?
Darlene: No, I’m not worried about the basketball game.
Roseanne: Did you mess up in history again?
Darlene: No, I didn’t mess up in history.
Dan: So what was it then?
Long pause
Dalene: I got my period, okay?
She runs from the room while Roseanne & Dan stare at each other with their jaws dropped.
Frasier – The episode where Frasier ends up slugging somebody:
Niles: “Floats like a hymenoptera, stings like a lepidoptera!”
Night Court
Harry: “I believe in keeping an open minc, but not so open my brain falls out of my head!”
More Friends: Joey on Pyramid.
I was very young when watching the “Dyck Van Dyke Show,” but I have a memory of watching Mary Tyler Moore in the tub (not THAT way), lazing around taking a bath, and casually sticking her big toe up the tub spout, and it getting stuck there.
The “Friends” scene that does it for me is the three girls sitting around in their wedding dresses, drinking beer, and Rachel going to the door and throwing it open and saying, “I DOOOoooo…”, expecting one of the guys to be there. Instead, it’s her boyfriend who she has been acting very crazy with; she shuts the door and says, “That oughta do it.”
The whole “Friends” episode that stands out for me is the one where Ross is getting a Paleontology award and everyone is getting ready for it - the one with lunges, and stealing chair cushions, and going commando.
I can’t think of any particular “MASH” episode, but when I think of “MASH,” I always think of Hawkeye sniffing his food before eating it, with a not particularly happy look on his face.
Thought of some more - “Golden Girls” scenes - eating cheesecake in the kitchen (how were these women not 300 pounds each?), and Rose telling Saint Olaf stories. And Rose saying something about how her husband was getting older, and they were down to two times a day, instead of their usual pace, and the looks on the other ladies’ faces. 
Golden Girls–Blanche’s prison penpal shows up when Blanche is home, the “girls” tell him Blanche is not here and then run her down, telling him she’s frigid, then sayings she’s ugly
Blanche: You stop that, Rose Nyland. Blanche is not ugly. She’s gorgeous. Gorgeous, gorgeous, gorgeous.
Penpal: Great! I have to leave now, but tell Blanche I’ll be back for her. (he leaves)
Blanche: And stupid. Stupid, stupid, stupid.
Heh, when I think of MASH, I think of the episode where the MASH is being swamped with casualties, nobody has time to sleep, and when they do doze off, they have very bad dreams. The priest dreams that he’s administering Mass when Jesus on the Crucifix (yay Catholic chuches) begins bleeding on him, and when he looks back down at the chapel, it has turned into the MASH operating room with everyone rushing around trying to save wounded soldiers.
For Babylon 5, it’s almost all Ivonova moments, early examples include the famous Babylon 5 Mantra, which consists of:
"Ivanova is always right. I will listen to Ivanova. I will not ignore Ivanova’s recommendations. Ivanova is God. And if this ever happens again Ivanova will personally rip your lungs out!
long pause, then looks up
“Just kidding about that God part.”
Cowboy Bebop: “Bang.”
Fawlty Towers: Biscuits? Would you care for a rat? Or … ? Just … just the biscuits then please, Polly.
Blackadder: The final scene of series 4 (Blackadder Goes Forth). I wouldn’t want to spoil that for anyone.
Addams Family–I love it when you talk French.
I was going to post a similar scene in Star Trek (TOS), in Amok Time.
Spock thinks he has killed Kirk and is trying to get somebody (McCoy, maybe?) to place him under arrest, when the Captain walks in.
It was something like this:
Spock: I have killed my Captain, and my friend.
Kirk (entering): Don’t I get a say in this?
Spock: Jim! . . . I mean, I am surprised to see you, Captain.
I have mangled this severely; it has been several years since I last saw it.
RR
Night Court–When Buddy tells Harry he is not just his stepfather, but also his biological father, having had an affair with Harry’s mother when she was 15 years old and in a mental institution. Rather than giving Harry the stigma of a mentally ill father, they let everyone believe that Judge Harry Stone Sr. was Harry Jr’s father.
A great scene between Harry Anderson & John Astin.
Speaking of Night Court:
Bull: Mind if I smoke?
Speaking of Addams Family:
Morticia: Do you mind if I smoke?