Fright Night (1985) (DVD)

Charley Brewster ia a normal American teenager whose mother thinks he watches too many late night horror films. Charley's life is pretty uneventful - until he becomes convinced that his suave, yet sinister, neighbour Jerry Dandridge (Chris Sarandon) is a vampire.
No-one, least of all the police, will believe that Dandridge is the vicious killer responsible for a spate of bizarre murders. Charley finds an ally in Peter Vincent (Roddy MacDowall), a former horror film star and host of TV's Fright Night Theatre, in his quest to nail the debonaire bloodsucker. But then the nightmare really begins...