An Enterprise crewman who beams down to planet M-113 with Kirk and McCoy and is lured away and killed by the shape-changing salt creature posing as Nancy Crater.
Crewman Darnell accompanies Kirk and McCoy to the archaeological site on planet M-113 in The Man Trap, the first episode of The Original Series to be broadcast. He was played by Michael Zaslow.
The party has come to give routine medical examinations to Professor Robert Crater and his wife Nancy. Each man sees Nancy differently; to Darnell she appears as a young blonde woman who reminds him of someone he met on Wrigley's Pleasure Planet. Kirk sends him outside for his tactless remarks, and she beckons him to follow.
He is found dead shortly afterwards with red ring-shaped marks on his face and a piece of poisonous borgia plant in his mouth. McCoy's autopsy shows that all the salt has been drained from his body, the first clue to the creature's nature.