An Enterprise-D chief petty officer whose paranoia in Ten Forward shows how badly the crew is affected by loss of dreaming sleep in Night Terrors.
Gillespie is a non-commissioned member of the Enterprise-D crew. He appears in the fourth-season episode Night Terrors.
The ship is caught in a Tyken's Rift beside the USS Brattain, whose crew killed one another. As the days pass, the Enterprise crew are unable to reach REM sleep and begin to hallucinate. In Ten Forward, Gillespie loudly voices the fear that the same fate awaits them and that the officers are hiding the truth, and his agitation helps set off a brawl.
Guinan ends it by firing an energy weapon she keeps behind the bar. The crisis is resolved when Troi, communicating in dreams with aliens trapped on the far side of the rift, arranges the explosion that frees both ships.