This film is one of those that everybody likes. It's funny, it's scary, it's got special effects that were way ahead of its time, and it's British. The two stars may be American, but everybody else in the film is English, it is all filmed in England, and it feels English. John Landis included some very un-American ploys in the making of this movie - for instance, the music includes three different versions of Blue Moon, plus Bad Moon Rising and Moondance. It's all set in current time (well, 1980), unlike the Hammer Horror and Lon Chaney werewolf films that people were used to. The hero ends up running around London zoo, naked, after waking up in the wolf's cage the morning after a night of rampage and violence. And that's another point - the hero is the bad guy. He's the werewolf in the story, but you're on his side. Nobody is on Freddy Krueger's side, or Michael Myer's side, in the American horror films that have been released over the last 20 years.
This is one of those films where you notice something different each time you watch. Be it Rik Mayall playing chess with Brian Glover in "The Slaughtered Lamb", the further decomposition of Jack each time he comes back to visit David, the inclusion of the Muppet Show in one of David's most horrendous dreams (plus Frank Oz, the voice of Miss Piggy and Fozzy Bear, as the man from the American Embassy), the really bad acting on the porno movie that's playing in Piccadily circus, the fact that Landis plays one of the London crowd who gets run over when the werewolf escapes from the cinema at the end, the offer of congratulations to Charles and Diana on the announcement of their engagement that rolls past as the end credits roll.
This 21st anniversary release contains a second disc showing how the movie was made, how the special effects were created, trailers, and loads more besides. And the commentary by the two lead actors as the movie is playing reveals just how much in awe of Jenny Agutter they were.