First appearances of catchphrases or notable character elements.
The Muppets[]
- Kermit the Frog's first time playing the banjo: Sam and Friends: A Horse Named Bill (1960) ??
- Rowlf the Dog's first time playing the piano: The Jimmy Dean Show Episode 117 (1964) ??
- Kermit the Frog's first "Hi-ho": Kermit's Lectures: Tall and Short (Sesame Street Episode 0015) (1969) ??
- Kermit the Frog's first time riding a bicycle: The Muppets Valentine Show (1974)
- Miss Piggy's first karate chop: The Muppet Show Episode 104: Ruth Buzzi (1976)
- Scooter's first "Scooter fist": The Muppet Show Episode 111: Lena Horne (1976)
- Miss Piggy's first "Kissy Kissy": The Muppet Show Episode 112: Peter Ustinov (1976)
- Gonzo's first attraction to chickens: The Muppet Show Episode 204: Rich Little (1977)
- Kermit the Frog's first "Yaaaay!": The Muppet Show Episode 213: Rudolf Nureyev (1978) ??
- Animal's first "Woman! Woman! Woman!": The Muppet Movie (1979)
- Fozzie Bear's first "Wocka Wocka": The Muppet Movie (1979)
Sesame Street[]
- First interaction between Big Bird and Oscar: Episode 0131 (first time onscreen together); Episode 0144 (first conversation)
- First celebrity guest: Carol Burnett (first aired), James Earl Jones (first recorded)
- First time Big Bird and Granny Bird are onscreen at the same time: Episode 3006
- First instance of Telly's obsession with triangles: Episode 2780
- First time Rosita is seen without wings: ??