Réalisation: Jim Henson
Les diamants de Lady Holiday, créatrice de mode, ont été dérobés, et les reporters Kermit et Fozzie décident de mener l'enquête. Alléchés par un grand scoop, ils partent pour Londres, ne sachant guère par où commencer. L'histoire se complique vite quand les diamants refont surface autour du cou de Miss Piggy, un top model de Lady Holiday. Kermit et son équipe de détectives Muppet doivent se dépêcher pour piéger les vrais voleurs...
Jim Henson
Kermit the Frog / Rowlf the Dog / Dr. Teeth / Waldorf / Swedish Chef / The Muppet Newsman / Zeke / Man in Dubonnet Club
Frank Oz
Miss Piggy / Fozzie Bear / Animal / Sam the Eagle / Gramps / Swedish Chef (voice)
Dave Goelz
The Great Gonzo / Beauregard / Zoot / Dr. Bunsen Honeydew / Lobbuck Lou / Singing Food (voice)
Jerry Nelson
Sergeant Floyd Pepper / Pops / Lew Zealand / Louis Kazagger / Bellhop Rat / Slim Wilson / "Dirty Bird" / Man in Park
Richard Hunt
Scooter / Statler / Sweetums / Janice / Beaker / Bellhop Rat / Bubba / Gramps / Monster / Singing Food / Cab Driver
Charles Grodin
Nicky Holiday
Diana Rigg
Lady Holiday
John Cleese
Neville
Robert Morley
British Gentleman by Pond
Peter Ustinov
Truck Driver
Jack Warden
Mike Tarkenian
Steve Whitmire
Rizzo the Rat / Lips / Bellhop Rat / Monster / Singing Food / Zeke (voice)
Louise Gold
Annie Sue Pig / Chicken / Lou / Singing Food / Lady Holiday's Secretary / Pigeon Sounds / Dubonnet Club Dancer
Kathryn Mullen
Chickens / Gaffer the Cat / Monster / Singing Food / Passenger in Cab / Pigeon Sounds
Bob Payne
Muppet Performer / Bellhop Rat
Brian Meehl
Muppet Performer
Mike Quinn
Muppet Performer
Robbie Barnett
Muppet Performer
Hugh Spight
Muppet Performer / Street Dancer
Brian Henson
Muppet Performer / Cyclist
Jim Henson
Kermit the Frog / Rowlf the Dog / Dr. Teeth / Waldorf / Swedish Chef / The Muppet Newsman / Zeke / Man in Dubonnet Club
Frank Oz
Miss Piggy / Fozzie Bear / Animal / Sam the Eagle / Gramps / Swedish Chef (voice)
Dave Goelz
The Great Gonzo / Beauregard / Zoot / Dr. Bunsen Honeydew / Lobbuck Lou / Singing Food (voice)
Jerry Nelson
Sergeant Floyd Pepper / Pops / Lew Zealand / Louis Kazagger / Bellhop Rat / Slim Wilson / "Dirty Bird" / Man in Park
Richard Hunt
Scooter / Statler / Sweetums / Janice / Beaker / Bellhop Rat / Bubba / Gramps / Monster / Singing Food / Cab Driver
Charles Grodin
Nicky Holiday
Diana Rigg
Lady Holiday
John Cleese
Neville
Robert Morley
British Gentleman by Pond
Peter Ustinov
Truck Driver
Jack Warden
Mike Tarkenian
Steve Whitmire
Rizzo the Rat / Lips / Bellhop Rat / Monster / Singing Food / Zeke (voice)
Louise Gold
Annie Sue Pig / Chicken / Lou / Singing Food / Lady Holiday's Secretary / Pigeon Sounds / Dubonnet Club Dancer
Kathryn Mullen
Chickens / Gaffer the Cat / Monster / Singing Food / Passenger in Cab / Pigeon Sounds
Bob Payne
Muppet Performer / Bellhop Rat
Brian Meehl
Muppet Performer
Mike Quinn
Muppet Performer
Robbie Barnett
Muppet Performer
Hugh Spight
Muppet Performer / Street Dancer
Brian Henson
Muppet Performer / Cyclist
Jim Henson
Kermit the Frog / Rowlf the Dog / Dr. Teeth / Waldorf / Swedish Chef / The Muppet Newsman / Zeke / Man in Dubonnet Club
Frank Oz
Miss Piggy / Fozzie Bear / Animal / Sam the Eagle / Gramps / Swedish Chef (voice)
Dave Goelz
The Great Gonzo / Beauregard / Zoot / Dr. Bunsen Honeydew / Lobbuck Lou / Singing Food (voice)
Jerry Nelson
Sergeant Floyd Pepper / Pops / Lew Zealand / Louis Kazagger / Bellhop Rat / Slim Wilson / "Dirty Bird" / Man in Park
Richard Hunt
Scooter / Statler / Sweetums / Janice / Beaker / Bellhop Rat / Bubba / Gramps / Monster / Singing Food / Cab Driver
Charles Grodin
Nicky Holiday
Diana Rigg
Lady Holiday
John Cleese
Neville
Robert Morley
British Gentleman by Pond
Peter Ustinov
Truck Driver
Jack Warden
Mike Tarkenian
Steve Whitmire
Rizzo the Rat / Lips / Bellhop Rat / Monster / Singing Food / Zeke (voice)
Louise Gold
Annie Sue Pig / Chicken / Lou / Singing Food / Lady Holiday's Secretary / Pigeon Sounds / Dubonnet Club Dancer
Kathryn Mullen
Chickens / Gaffer the Cat / Monster / Singing Food / Passenger in Cab / Pigeon Sounds
Bob Payne
Muppet Performer / Bellhop Rat
Brian Meehl
Muppet Performer
Mike Quinn
Muppet Performer
Robbie Barnett
Muppet Performer
Hugh Spight
Muppet Performer / Street Dancer
Brian Henson
Muppet Performer / Cyclist