S1·E21 Flash Gordon and the Brain Machine
Aired March 11, 1955
Synopsis
Continued from last episode where Zarkov and Commander Richards are caught destroying the atmosphere of Neptune. Flash and Dale replace the machine that returns the breathable atmosphere to Neptune. Zydereen teleports Zarkov and Richards to Saturn where she starts drainng their knowledge and memories. Flash and Dale arrive but are too late to help their friend and Zydereen escapes.