Donna Akersten
Samantha the Cat / The Sheep (voice)
Stuart Devenie
Sebastian / Dr. Quack / Daisy the Cow / Sandy the Chicken (voice)
Mark Hadlow
Heidi / Robert / Barry the Bulldog (voice)
Brian Sergent
Wynyard the Frog / Trevor the Rat / The Fly (voice)
Ross Jolly
Harry / Dennis / Abi Bargwan / Mr. Big / Pekingese / others (voice) (uncredited)
Peter Vere-Jones
Bletch / Arfur the Worm (voice)
Mark Wright
Sid the Elephant / The Cockroach / Louie the Fish (voice)
Danny Mulheron
Heidi the Hippo (uncredited)
Jay Snowfield
Killer man (uncredited)
Doug Wren
Bletch (voice) (uncredited)
Peter Jackson
Audience Member in the Theater (uncredited)
Fane Flaws
Musician Frog (voice, uncredited)
