"I Just Want to be You": Where Red realizes that all of her talents just don't seem to be as wonderful or important as Mokey's. And instead of becoming angry or spiteful, she craves to be Mokey. The song "Dreaming of Someone" is truly heartbreaking.
The Trash Heap's attendants' interpretation of the situation makes it doubly heartbreaking when they discuss how she thinks everyone likes Mokey more than her, "...especially Gobo!"
"Marooned": Especially the way Mokey holds on to Boober's scarf (it fell off when he and Red were trapped in the cave) throughout the episode, as well as Red and Boober's little moments in the cave.
Boober: It's quiet. Maybe they've stopped trying to rescue us.
Red: Yeah, maybe. You know, Boober, I feel kind of giddy.
Boober: Yeah, giddy and tired. You know what that means, don't you?
Red: We're running out of air.
(Boober nods sadly)
Red: What do you think it's like... to die?
Boober: I don't know, Red. I don't think anyone does. ... You know, I remember this one day while doing my laundry, and then this big soap bubble floated right up from the tub, and there it was in front of my face, beautiful and shiny, and then it was gone.
(Red begins sobbing)
Boober: Red, don't be sad.
Red: I...I can't help it...
Boober: It was fun while it lasted, all the good times and the songs and the laughs and stuff...
Red: You always said you didn't like the good times and the songs and fun.
Boober: Well...sometimes I liked them. But that's a secret.
One of the worst moments in the episode is when Wembley asks Gobo if he can do anything to help, and Gobo gravely instructs Wembley to stick close to Mokey (who is praying and attempting to radiate positive vibes through the cave-in) so that she'll have a friend close by in case things...don't turn out happily.
"Mokey's Funeral" manages to evoke this even when we know from the beginning that Mokey's actually okay.
Gobo: It was Mokey. I'm sure it was Mokey.
Red: No, no, it wasn't her. (tearfully) She's my best friend.
Gobo: Her plan must've gone wrong; an accident.
Red: But... she's my best friend! You don't understand! She's my BEST FRIEND!!!
Junior's song, "And the Joke Isn't Funny Anymore" certainly speaks to this event.
"The Beast of Blue Rock" Gobo leaves his roommate Wembley alone for (presumably) the first time to face the dreaded Beast. The song Wembley sings will haunt you forever.
The moment towards the ending of "All Work and All Play" when Cotterpin Doozer, having spent the entire episode wanting to be a Fraggle, realizes that no matter how much she wishes otherwise, she's never going to become anything other than a Doozer. The only thing that saves the episode from having a downright Downer Ending is that she manages to find her niche in Doozer society as the Architect's new apprentice.
The song "Goodbye" from the episode "Manny's Land of Carpets":
"Goodbye, goodbye, every eye is dry. Leaving? There's no grieving just a rainbow in the sky. Goodbye, goodbye, goodbye."
"Home is Where the Trash is": When Philo and Gunge decide to leave Marjory to find 'home'. Marjory becomes depressed to the point of dying, her moaning which turns into soft crying tugs, if not rips, the heartstrings.
The song 'I Don't Understand Him' from "Uncle Matt's Discovery"
Uncle Matt: He yells-
Gobo: -and he tells me-
Uncle Matt: -I smell-
Uncle Matt: -I don't-
Gobo: -understand why-
Uncle Matt: -I want him-
Gobo: -to like me.
Together: I love him so much I could bawl, but I don't understand him at all.
If "The River of Life" doesn't make you sniffle at least once, you have no heart. Boober stands at the hole to Outer Space, begging the Silly Creatures to stop poisoning the caves, asking if the Fraggles or Gorgs have done anything to upset them. What Boober doesn't know is that Doc and Sprocket are out at the moment, and he's speaking to an empty, uncaring room - except for us.
"Gone, but not Forgotten": Wembley befriends a Mudbunny named Mudwell, but finds out his new friend has a very short life span.
Wembley: Why did you push me away?
Mudwell: Because a Mudbunny never knows when the time will come. Though that's alright with me, it's bound to hurt anyone I've made friends with when I have to say goodbye.
After Mudwell's death, Wembley's Fraggle friends try to make him feel better in various ways, but to no avail. Eventually, he and Gobo have a simple heart-to-heart talk about it, and Wembley has this line:
Wembley: I've had lots of happy moments with Mudwell... but I—I don't feel like part of him is still alive... because I'm not used to all of him being gone.
"Just a Dream Away" has lyrics that are particularly profound: Once I wasn't here, and then I suddenly appeared... just like water flowing, I know where I'm going... you got to leave, to stay. Richard Hunt's death does not help matters.
"Change of Address" is one giant case from beginning to end. You'll likely be reduced to mush long before, but Sprocket's whimpering at Doc's words (and Doc's words themselves) that they'll never see Gobo again is the definite breaking point. Of course, mere moments later, they do see Gobo, but it doesn't make the emotional impact any less. And the whole "Magic Be With You"' segment with the tunnel will break you up to and including the very end of the credits.
Gobo's song "Petal of a Rose." Even harder to listen to after Jerry Nelson died.
Outside of the series, one line uttered in an interview that Gerry Parkes gave after the series ended: "I miss my Sprocket."
Pretty much everything about this show, now that Gerry Parkes (Doc) has passed away. The last two episodes, "The Honk of Honks" and "Change of Address", might be the worst, since both episodes featured Gobo finally meeting Doc after five seasonsnote technically four, but the last season was split into two smaller seasons due to Executive Meddling. Keep in mind that Gobo's puppeteer Jerry Nelson (also the voice of Pa Gorg, The Trash Heap and many others) had passed away two years earlier, in 2012; to see their characters onscreen together is almost too much to bear.
The aforementioned "I miss my Sprocket" line becomes more poignant as well.
"The Fraggles Look For Jobs" is a video made by the puppeteers after the series finished production in 1986, and it was shown at the wrap party.note Most of the jokes are In Jokes and name drops of crew members. While it's mostly funny, the very end of the video, where the Fraggles sing about how they'll meet again someday, is gorgeous as well as gutwrenchingly depressing - topped off by someone giving Mokey a kiss at the very end.
The puppeteers stepping out to reveal themselves as they performed the final song as the Fraggles was the show's equivalent of the "taking off the wigs" scene from the final episode of The Kids in the Hall.
The fact that the show wrapped exactly four years before Jim died has some rather eerie parallels.
The final credit from the final episode: "This show is for Don Sahlin".