10 Strangest Worlds In Star Trek

10. Murder Planet

This charmingly named world (thank you, Jankum Pog) is one of the strangest on this list. While it's not the only dangerous planet that has been depicted in Star Trek, it is one of the few that is actively trying to kill anyone unlucky enough to set foot on its surface. 

When the Protostar lands on its surface, the young crew quickly discover that it is a place where dreams come true. Those dreams might be nightmares, but they are dreams nonetheless. The entire planet is linked under its surface, allowing coordinated attacks on unsuspecting prey, while also manifesting these poor creatures' desires to entice them into traps.

The planet's own properties may have inspired a native species to take to the stars, but still retain some of the lessons that their homestead bestowed upon them. Murder Planet was located, according to Hologram Janeway, in the Hirogen System. 

Almost all Hirogen representatives encountered by Starfleet before this stardate had been nomadic by nature, with no mention of a homeworld. It is unclear when Starfleet was able to discover and categorise this system as the Hirogen system. Hologram Janeway names it with some authority, suggesting absolute confirmation of the fact.

The Hirogen encountered by Starfleet began to make a little more sense after the visit to this world. If a species had been trained from birth to kill everything around them, lest they be killed by everything from the water to the plants, would that not encourage decent hunting skills?