Release Message:  Discovering that Buck, Buddy and Prince Tallen are being bombed by Killer Kane's air-pilots, Wilma (Constance Moore) turns her rocket ship back and drives the enemy away.

Description:  Discovering that Buck (Buster Crabbe), Buddy and Prince Tallen are being bombed by Killer Kane's air-pilots, Wilma turns her rocket ship back and drives the enemy away. She then takes the party to Hidden City, where Tallen signs a war pact to help in the war against Kane. Bad interplanetary radio reception makes it necessary for Buck, Tallen, and Wilma to ride a space-ship to Saturn to confirm the pact. Upon landing on Saturn they find an abandoned Kane ship and enter it in the hope of wrecking the controls. Kane's pilots spring forward and, closing the doors, release poison gas inside which apparently kills the three earth folk as they fall gasping to the floor.