Secrets of the Unknown #217

In "No Trespassing!" from Secrets of the Unknown #217, a wealthy man stakes claim to a mysterious beam of light on his land, charging thousands to those seeking its healing glow—until the beam, revealed to be an alien weapon test, escalates beyond control, leaving him destitute.

In "He Changed at Midnight," a Mercurian hiding among Earth's inhabitants must reset his clock at midnight to maintain his disguise—until a greedy man threatens to expose him for a reward. Written by an unknown author and illustrated by an unknown artist, the story unfolds in just four pages, blending quiet tension with a sci-fi twist that leaves one man stranded on a distant planet as a lesson in greed.

In "It Waits In the Tank!" from *Secrets of the Unknown* #217 (1983), a man’s curiosity about a bizarre sea creature leads to a chilling transformation—his mind trapped inside a glass tank as the alien lifeform takes over his body from within. The story unfolds with quiet dread, focusing on the horrifying shift between consciousness and possession, leaving the fate of the man’s identity hanging in the cold, reflective glass.

In "Only One Returned!", two men venture into a cave shaft with a deadly secret—only one will make it out alive. When one betrays the other to claim his girlfriend, a sudden fall into the river sets off a chain of events neither expected, leaving the betrayer trapped in quarantine after exposure to radioactive contamination.