The Mystery of Deneb IV
The Distress Call That Lied

Dave Carter is on medical leave, headed for rest and low gravity, when a wide-beam distress call interrupts his course. The call comes from Deneb IV—an unexplored world—and claims a stranded survey crew is desperate for rescue. What Carter finds instead is a functioning base, calm officers, and a quiet insistence that no SOS was ever sent. When he presses for answers, he’s attacked, restrained, and told he simply doesn’t remember things correctly.As Carter moves deeper into the expedition’s operation, the contradictions grow sharper. Men speak in flat, metallic tones. Orders arrive without voices. Work continues with mechanical certainty toward a purpose no one will explain. Carter realizes he is surrounded by people who are no longer fully their own—and worse, that someone is watching his thoughts, testing him, waiting for the moment he breaks.The Mystery of Deneb IV is a science-fiction thriller that turns mind control into a tactical problem instead of a metaphor. It unfolds with mounting pressure as Carter balances deception against discovery, knowing that one wrong signal could trigger his execution—or something far worse. The story’s tension comes not from what the alien intelligence wants, but from how patiently it waits.Robert Silverberg wrote this early career story during his prolific 1950s period, when his work regularly appeared in magazines such as Amazing Stories and Fantastic. Even at this stage, Silverberg shows a sharp instinct for pacing and menace, building suspense through restraint rather than spectacle. The Mystery of Deneb IV stands as a compact, high-stakes example of his ability to fuse psychological threat with classic space-era adventure.