The Muppet Show - Season 4 - Eps 10: Liza Minnelli
The Muppets present a murder mystery. Kermit is a private eye hired by Liza O'Shaugnessy, an actress whose production is being terrorized by a killer. The director, Fritz (Strangepork), is shot. The police assign Patrolbear Fozzie to the case, and he interrogates the cast: "All right, which one of you killed the director?" The suspects are themselves killed one by one, until Kermit and Liza team up to unmask the true killers.
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 309 votes)
Language: EN
Seasons: 6
Total Episodes: 120
Network: ITV1
Genres: Kids, Comedy, Family
Production Companies: Henson Associates, Associated Television (ATV), ITC Entertainment, Jim Henson Television, The Muppets Studio, ITV
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)