03:45Star Trek: The Next GenerationSeries 5Episode 18: Cause and EffectBBC Two Duration: 50 minutes Sat 26th Apr 2008, 03:45 on BBC Two Northern IrelandSci-fi adventures. When events on the Enterprise keep repeating themselves, the crew realise they are caught in a deadly time loop.ContributorsJean-Luc Picard:Patrick StewartWill Riker:Jonathan FrakesDeanna Troi:Marina SirtisBeverly Crusher:Gates McFaddenWorf:Michael DornData:Brent SpinerActor:Wil WheatonGenresDramaSciFi & FantasyBrandStar Trek: The Next GenerationSeriesStar Trek: The Next Generation: Series 5 Source: BBC Online