Introduction episodes

The first episodes of many Henson series are treated like regular episodes, that could easily air later in the shows run without confusion, as opposed to episodes that properly introduce the format of the series. This list is for shows that began with introduction episodes, as well as characters who were properly introduced.

Series that began with introduction episodes

 * Sesame Street
 * Fraggle Rock
 * Dinosaurs
 * Muppets Tonight

While Jim Henson does refer to the first episode of The Jim Henson Hour as the first episode in that episodes introduction, the episode otherwise is not treated as a first episode.

Episodes that introduce characters
A listing of episodes of shows that properly introduce characters to the cast. This is not a list of first appearances; Some characters who had introduction episodes actually did appear on their respective shows before their introduction episodes. This list does not include flashback sequences or introductions of characters only used once.

Sesame Street

 * Episode 0276 - Mr. Snuffleupagus is introduced.
 * Episode 1257 - Telly Monster is introduced.

The Muppet Show

 * Episode 106: Jim Nabors - Scooter is introduced (after having been in three previous epsiodes).
 * Episode 121: Twiggy - Uncle Deadly is introduced (after having appeared in an earlier episode).
 * Episode 302: Leo Sayer - Annie Sue is introduced (after making frequent background appearances in season two and being referred to by name in the previous episode).
 * Episode 310: Marissa Berensen - Lew Zeland is introduced.

Fraggle Rock

 * Episode 118: The Minstrels - Cantus and The Minstrels are introduced.
 * Episode 208: All Work and All Play - Cotterpin Doozer is introduced.

Dinosaurs

 * Episode 209: Unmarried... with Children -- Monica DeVertebrae is introduced.

Muppets Tonight
Miscellaneous Lists
 * Episode 102: Garth Brooks - Bill the Bubble Guy is introduced.
 * Episode 210: The Gary Chuenga Episode - Gary Chuenga is introduced (though he'd been seen earlier in the season)