Donna Akersten

Character: Samantha the Cat / The Sheep (voice)

Stuart Devenie

Character: Sebastian / Dr. Quack / Daisy the Cow / Sandy the Chicken (voice)

Mark Hadlow

Character: Heidi / Robert / Barry the Bulldog (voice)

Brian Sergent

Character: Wynyard the Frog / Trevor the Rat / The Fly (voice)

Ross Jolly

Character: Harry / Dennis / Abi Bargwan / Mr. Big / Pekingese / others (voice) (uncredited)

Peter Vere-Jones

Character: Bletch / Arfur the Worm (voice)

Mark Wright

Character: Sid the Elephant / The Cockroach / Louie the Fish (voice)

Danny Mulheron

Character: Heidi the Hippo (uncredited)

Jay Snowfield

Character: Killer man (uncredited)

Doug Wren

Character: Bletch (voice) (uncredited)

Peter Jackson

Character: Audience Member in the Theater (uncredited)

Fane Flaws

Character: Musician Frog (voice, uncredited)