The Muppet Show - Season 5 - Eps 13: Glenda Jackson
Glenda reveals herself to be Black Jackson the pirate captain, and she takes over the Muppet Theater with the help of Short John Silver (Sweetums) and Eric, a heartless pirate parrot (in disguise as a penguin). They tie Kermit up, turn the theater into a ship, and cast off to look for buried treasure. The show ends with a musical battle at sea, with Gonzo and a crew of chickens fighting to save Kermit and the theater.
About The Muppet Show

Title: The Muppet Show
First Air Date: 1976-09-05
Last Air Date: 1981-03-15
Status: Ended
Rating: 8/10 (from 322 votes)
Language: EN
Seasons: 6
Total Episodes: 120
Network: ITV1
Genres: Kids, Comedy, Family
Production Companies: Henson Associates, Associated Television, ITC Entertainment, ITV, HiT Entertainment
Synopsis
Go behind the curtains as Kermit the Frog and his muppet friends struggle to put on a weekly variety show.
Cast

Jim Henson
Kermit the Frog, Waldorf, Rowlf the Dog, Link Hogthrob, The Swedish Chef, Dr. Teeth, The Newsman (voice)

Frank Oz
Miss Piggy / Fozzie Bear / Animal / Sam Eagle / Marvin Suggs / George the Janitor (voice)

Jerry Nelson
Floyd Pepper, Dr. Julius Strangepork, Pops, Robin the Frog, Lew Zealand, Louis Kazagger, Chicken, Crazy Harry (voice)

Dave Goelz
Gonzo / Zoot / Beauregard / Dr. Bunsen Honeydew (voice)

Richard Hunt
Statler, Scooter / Janice / Beaker / Wayne / Sweetums (voice)

Eren Ozker
Hilda / Wanda / Janice (voice)

Louise Gold
Annie Sue Pig / Additional Muppets (voice)

Karen Prell
Additional Muppets (voice)

Brian Muehl
Additional Muppets (voice)

Kathryn Mullen
Additional Muppets (voice)