Story & Art: Mac Raboy
Original run: 1957-01-06 to 1957-03-10
Summary: Stranded in a deserted sky city (see S-061 Paxora), Flash, Dale and Dr. Zarkov teleport themselves back to Mongo's surface with the help of a hastily re-assembled robot.
Commencing their long journey to the Forest Kingdom, Zarkov begins to harbour doubts about his re-wiring of the robot, as the latter begins to display human emotions and starts using its acquired indestructibility to its own ends...
(Source of summary: www.ipcomics.net)
All credits go to "spax".