Night and Day omnibus 69 (episodes 205-206-207), original broadcast on 6 March 2002. VHS rip, recorded from ITV.
This is a crucial episode for many of the main characters and storylines - including the story of Jane's disappearance. Make sure to see both versions - omnibus and the three 20-minute episodes - because in this case the differences are quite big, and you'd be missing on a lot of interesting footage if you see just one version.