Cast
Lorne Greene
Grandfather
Sammy Davis Jr.
Head Ratte
Margery Gray
Heidi
Pamelyn Ferdin
Klara
Michael Bell
Willie
Peter Cullen
(I)
Gruffle
Roger DeWitt
Peter
Richard Erdman
Herr Sessman
Fritz Feld
Sebastian
Directing
Robert Taylor
Director
Art
Dennis Venizelos
Background Designer
Visual Effects
Rick Maki
Animation