Characters played by Alan Young
7-Zark-7
Keyop
Characters played by Keye Luke
Zoltar
The Great Spirit
Colonel Cronus
The Great SpiaZoltar
The Great SpiritColonel Cronus
The Great Spiritrit
Characters played by Ronnie Schell
Jason
Characters played by Janet Waldo
Princess
Susan
Characters played by Casey Kasem
Mark
Characters played by Alan Dinehart
Chief Anderson
Tiny Harper
Characters played by Takayo Fischer
Additional Voices
Characters played by David Jolliffe
Additional Voices
Characters played by Alan Oppenheimer
Additional Voices
Characters played by William Woodson
Additional Voices
Narrator