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Five years after investigating the inexplicably abandoned colony Tartiannen Three, several members of the away team are mysteriously seized with the urge to return to the deserted outpost. Joining forces with Geordi, Lt. Cmdr. Susanna Leitjen (Maryann Plunkett), who led the first investigation of Tartiannen Three, sets out to retrieve the wayward away team. Geordi is attacked by a deadly parasite, which threatens to transform him into alien creature. First telecast March 30, 1991, the Emmy-nominated "Identity Crisis" was scripted by Brannon Braga, from a story by Timothy De Haas.