If you know of more people who worked on this cartoon, or want to submit additional production information about The Dark Sleep, please submit your information here.
- Story Direction: Howard Swift.
- Production Design: Iwao Takamoto.
- Production Coordinator: Victor O. Schipek.
- Layouts: John Ahern, Pete Alvarado, Dick Bickenbach, Brad Case, Walt Clinton, Richard Gonzalez, Gary Hoffman, Jack Huber, Tom Knowles, Lance Nolley, Joel Seibel, Don Sheppard.
- Backgrounds: Walt Peregoy, Janet Brown, Sheila Brown, Albert Gmuer, Fernando Montealegre, Gary Niblett, Eric Semones, Peter Van Elk.
- Titles: Robert Schaefer.
- Technical Supervisor: Frank Paiker.
- Ink and Paint Supervisor: Roberta Greutert.
- Xerography: Robert "Tiger" West.
- Sound Direction: Richard Olson.
- Camera: George Epperson, Charles Flekal, Bill Kotler, Ralph Migliori, Cliff Shirpser, Roy Wade.
© 1968 Hanna-Barbera Productions, Inc.
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