Cenkella

The lone planet of the Cenkella system and home to the Cenkellans. The USS Secondprize went to Cenkella on Stardate 52688 on a First Contact mission. Things went badly when the away, under the command of the visiting Commander Conway, was attacked by the Cenkellans. Their weapons were useless on humans, however, allowing Conway to take control of the planet. The Cenkellans eventually figured out that plain old bullets would work and forced Conway to surrender. ("Of Gods and First Officers" [TRK, VEX])