Following the defeat of Adam; Buffy, Willow, Xander and Giles decide to chill out in front of a movie. They all fall asleep quickly and each start having strange, somewhat uncomfortable dreams. In turn we Willow, Xander, Giles and finally Buffy's dream; while they are each different and feature a worry felt by the dreamer there are similarities; each character feels that there is something after them, which ultimately catches them... it isn't until Buffy's dream that it becomes apparent what this is. They also feature a man with slices of cheese for no obvious reason.
I thought this was a really good episode; the way the dreams are constantly changing felt real and their contents were scary at times but also quite humorous. Having an episode centred on dreams meant certain characters who had previously died could return; most notably Principal Snyder... a delight seeing Armin Shimerman perform in the style of Brando in 'Apocalypse Now'. The identity of the character after our protagonists proved to be interesting and nicely linked to the spell cast to help Buffy defeat Adam. There isn't too much in the way of action but that is made up for with the general feeling of dread. Overall a solid conclusion to season four.