A young Starfleet ensign in the Enterprise landing party on Gamma Trianguli VI in 2267, killed by an explosive rock while hurrying back to report on the village of the People of Vaal.
Ensign Mallory appears in the second-season episode The Apple. He is one of the security men who beam down with Kirk to a planet that looks like a garden and proves to be lethal, with poisonous plants, directed lightning and rocks that detonate when struck.
Sent ahead to scout, Mallory finds the village and the great serpent-headed idol of Vaal. His communicator report is garbled, and as he runs back to the others he stumbles on one of the explosive rocks and is killed instantly.
Kirk takes the loss personally. He tells Spock and McCoy that he knew the family, and that Mallory's father had helped him get into Starfleet Academy. Mallory was played by Jay Jones.