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Ami Foster as Kristi |
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Danny Cooksey as Crown Prince Bu |
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Vincent Price as King Ulvik (Right Head) / Kristi and Sonja's Father |
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Jonathan Winters as King Ulvik (Left Head) |
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Don Knotts as Professor Nidaros |
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Cloris Leachman as Queen Sirena |
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Charlie Adler as Stav |
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Michael Bell as Ribo / Krill |
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William Christopher as Bjørn |
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Laurie Faso as Prince Borch (Left Head) |
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Christina Lange as Sonja |
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Rob Paulsen as Prince Borch (Right Head) |
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Neil Ross as Prince Prag (Right Head) |
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B.J. Ward as Bjørn's Wife |
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Frank Welker as Prince Prag (Left Head) |
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Alvy Dorman as Malfred |
| Sound | Al Allen | Music |
| Directing | Ray Patterson | Director |
| Production | Andrea Romano | Casting |
| Writing | Shirley Hartman | Writer |
| Writing | Clifford Campion | Writer |
