Star Trek: The Next Generation (1987)

S4E17 Night Terrors

Stardate: 44631.2. As the Enterprise becomes ensnared in a spatial anomaly, Troi is plagued by a haunting dream that replays night after night. Meanwhile, the crew struggles with the effects of dream deprivation, leading to a gradual descent into madness. The psychological toll weighs heavily as nightmares threaten to unravel their sanity.