On a mapping journey the Enterprise hosts a party of Ullian 'mind historians', specialists who telepathically retrieve people's long-forgotten memories from many races. Keiko O'Brien and Dr. Crusher enjoy resuscitating pleasant memories, but the Ullian leader Tarmin's frustratingly overbore son Jev abuses his abilities on non-volunteers, against their code, and enters their thus nightmare-altered memories as a key character, leaving Troi and Riker in an apparently unprovoked coma which only resembles the rare neurosis irizine, without the associated histamine level change. Then it happens to Crusher the bad way, but Troi wakes up after three days, alas with a total black-out. After eliminating any other imaginable cause, Picard has to suspect the Ullians, Troi accepts a memory probe by Jev, who makes her believe it's Tarmin's doing, but Geordi and Data do some research... Written by
Did You Know?
Doctor Crusher refers to the thalamus as "the part of the cerebral cortex involved in memory function." However the thalamus is not part of the cerebral cortex, and is not considered all that vital to most memory processes. See more
Counselor Deanna Troi
It's not easy having an overbearing parent. Believe me, I know how you feel.
Star Trek: The Next Generation End Credits
Composed by Jerry Goldsmith
and Alexander Courage See more