Mr. Grimes / Voice of Killer Shark

James Mason

Acting

Mr. Masterman / Voice of Eel

Bernard Cribbins

Acting

Mrs. Doasyouwouldbedoneby / Old Crone / Mrs. Tripp / Woman in Black / Water Babies 'Gate Keeper'

Billie Whitelaw

Acting

Tom

Tommy Pender

Acting

Elly

Samantha Gates

Acting

Lady Harriet

Joan Greenwood

Acting

Sir John / Voice of Polar Bear

David Tomlinson

Acting

Salmon

Jon Pertwee

Acting

(voice)

David Jason

Acting

(voice)

Una Stubbs

Acting