Sid was mentioned back in the "Tales of Leo" episode.
Donny: Well, so much for that family reunion. Cousin Sid brought a Federation blaster to the party.
Raph: We should have known Casey's lack of smarts would run in the family.
Donny: What should we do?
Mikey: Hey, I've got it. We disguise ourselves in old animal skins, get close enough to Sid, And spring on him.
Raph: Oh, Mikey. If only I could reach you right now. BAM. (ribs crack) Aw, aw.
Mikey: (sits in a chair and rests his legs) Ah, that's... better. (Pauses and sniffs the air) Ew, what's that smell?! It smells like burnt... (looks to the burnt Splinter who gives him an evil look) Oh, right. Sorry, sensei.
Donatello: (after hanging the purple dragon thug by his leg) Nighty night, dragon boy. (punches him in the face)
Purple Dragon Thug: Ewww! What's that smell? It smells like burnt...
Splinter hits him)
Purple Dragon Thug: OW!...hair (in high pitch voice, then faints)
Splinter: I may indeed smell, but at least I am still conscious.
Casey: Sid, you knew better than to fight me when we were little kids, did you get dumber of something?
Mikey: Raph needs a hiding place, don't you Raphie?
(Leo and Donnie put Raph in a closet)
Raph: No way am I missing any of the action!
Mikey: Don't worry Raph, we'll come back for you....maybe.
Raph: Oh, Mikey! You better hope I never heal! Ow.
Michelangelo: Two busted legs, flat on my shell, and I'm still all that and a bag of chips. Mmmm, Chips...
Sid: I've been diggin' holes here for years, and I find out she [Grandma Jones] donated it all to charity. She gave it away!
April: (laughing) Well, I suppose that about makes her the only white sheep in your family.
Michelangelo: (About April, Casey, and Sid) They're laughing-that's nice. I can't move and they're laughing!
Raphael: We'll heal. Then we'll beat the shell out of Casey for havin' such a whackbag family. But you're first, Mikey.
(He hits Michelangelo.)
Raphael: Hey I don't mind! I love it when Leo talks tough. We should get Karai to stab him more often.
Leonardo: I'll rest when... I'll rest later.
This episode is based on Tales of Teenage Mutant Ninja Turtles V1 #1.
Villains: Purple Dragons
Prologue Narrator: Splinter
Another one of Casey's family members is introduced.
As of this episode (and season), the theme song's lyrics are changed. The following is what's been changed.
"Turtles, count it off!
ONE! Leonardo's always in control!
TWO! The wise guy is Michelangelo!
THREE! Donatello is the brains of the bunch!
FOUR! Count on Raphael to throw the first punch!"
"Turtles, count it off!
ONE, TWO, THREE, FOUR! (TURTLES!)
There's no one better! (TURTLES!)
Mikey: We shredded Shredder!"