03:20Star Trek: The Next GenerationSeries 4Episode 18: Identity CrisisBBC Two Duration: 50 minutes Sat 26th Jan 2008, 03:20 on BBC Two Northern IrelandSci-fi drama series. Geordi discovers that other members of an away mission he went on five years earlier are disappearing mysteriously.GenresDramaSciFi & FantasyBrandStar Trek: The Next GenerationSeriesStar Trek: The Next Generation: Series 4 Source: BBC Online