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Daws Butler as Loopy De Loop / Rocket Scientist (voice) |
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Hal Smith as Drowning Man (voice) |
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Don Messick as Space Probe Administrator / Scuba Diver (voice) |
| Directing | Joseph Barbera | Director |
| Production | Joseph Barbera | Producer |
| Directing | William Hanna | Director |
| Production | William Hanna | Producer |
| Writing | Warren Foster | Story |
