be tried while Arnold sleeps. Under sedation his brain waves are transmitted by laser beams into holograms which, via depictograph, make visual the workings of his mind and memory. During the first experiment, Arnold's subconscious recalls his pre-mission briefing, his learning that a Gregory Gallea vanished two years before on a similar assignment. Next morning, momentarily alone, Arnold answers the phone. A voice says: "I know you, Hagen Arnold. This is Gregory Gallea!" and hangs up. Fearful, confused, Arnold tries to flee but is stopped by the others. That night another Gallea call warns Arnold he is in danger. The monitor advises Crowther of the call. Next morning Arnold slips out, nearby encounters Karen Summers (GRETA BALDWIN). She's an "absentee" from the "kinery," where pills are processed from dairy products. Mutually puzzled and attracted, they stroll, unaware they're watched, furtively by Gallea (MONTE MARKHAM), electronically by the scientists. That night officers take Karen from the kinery dorm to the farm. Meanwhile, Crowther learns that on his last flight Arnold had a co-pilot who was never found.

Gallea garrots a guard, wakens Karen, tells her Arnold's real identity, says Crowther is a traitor who will destroy Arnold's mind. Next day the guard's body is found, security is increased and Arnold grows restive and rebellious. The tests show Arnold finding Gallea in Sino-Asia, their capture by Sinoese troops, Arnold's meeting with their leader. They see Arnold's rescue by Gallea from an underwater prison, their plane's takeoff and escape through the Sinoese radiation barrier. Suddenly the image of Arnold's brain blots the scene as on his bed, the subject screams in horror. An amorphous mass hovers near him, dissolves as the others enter. Arnold wakens, recalls a fearful pain inside his skull, then loses consciousness. The weird mass, says Crowther, was Arnold's subconscious, a form of energy created by his brain and released by the holograms.

Meanwhile, Gallea gets back to Karen, is urging her to help abduct Arnold when the mass materializes, attacks and kills Gallea, then dissolves. The doctor realizing Gallea's brain cells are still alive applies the Arnold test to Gallea's brain to solve the mystery. Gallea's brain, fitted with electrodes, and the depictograph shows Arnold and Gallea in the plane. Suddenly Gallea injects Arnold with a Sinoese bacterial culture of ancient dread diseases, gloats that soon the pain will activate the de-memory serum. Arnold will be a living death bomb set to go off in 14 days, spread disease, death and panic. The Sinoese will conquer the West without firing a shot. He'd joined the plot, Gallea shrugs, to save his own mind. The hologram fades. Grimly, Crowther says the 14 days are up, they've all been infected by Arnold. Lest they spread the infection they must all stay there, dying one by one in voluntary but heroic isolation. But Crowther offers the solution of mass inoculation, and the fact that Arnold in his frozen state was inert so then were the deadly diseases and therefore the western world had gained precious time, to find a cure.