Rish Outfield's reviews
I didn't know there was a Prom Night 4, but I like the series and hope there are more. The "Mary Lou" films were the most fun, but this wasn't half bad. The plot was a combination of two we've seen before: a bunch of horny teens spend the night in a secluded summer home; and a great evil escapes from its captivity, seeking death and destruction in those it finds. A lot of this movie was well-thought-out and interesting, especially the scenes involving a possessed priest and those entrusted with his care. The parts with the couldn't-be-more-Canadian teenagers were sillier, with sex being the driving force in their lives (I said silly, I didn't say fictional, and it sure was entertaining), but they were pretty likable. Star Trek: Deep Space Nine and Earth 2's Nicole DeBoer was the virgin, and then some (announcing it severally throughout the film). She's cool. There was some very silly sex dialogue and scenes, but silly in an amusing sort of way. I still had a good time watching it.
A very long possessed priest prologue preceded Prom Night 4, but this really had less to do with Prom Night than The People Versus Larry Flint. It was really fun, but it sure fell apart at the end, with predictable slasher highjinks, and the worst, least-satisfying ending since...I don't know, maybe Monty Python & the Holy Grail.

The tyranist's thoughts
Father Jonas is the villain in this series entry that starts out very creepy and scary and turns into just another run of the mill horror film. Messing with possession and priests gone bad has always got my hackles up, but few movies maintain it and this wasn't an exception. The very creepy Father Jonas turned into a slasher about half way through the movie and never turned back. They did include the standard Prom Night flashback and it was kind of loosely tied into the whole prom theme, but really this movie was pretty independent of the rest. The first half is worth seeing, but you probably shouldn't rent it thinking that you are going to get the same stuff as the rest of the entries.