Corman and Cohen

 

 (imdb)

SATURDAY THE 14TH-1981-John (Richard Benjamin) and Mary (Paula Prentiss) inherit a haunted house from a recently departed uncle. 

Unfortunately, a pair of vampires want a book they have that their son (Kevin Brando) has already opened and releasing some monsters. Weird things happen. An exterminator (Mousie Garner) sends Van Helsing (Severn Darden) to get rid of their bats. Waldemar (Jeffery Tambor), the male vampire puts the bite on Mary. 

Despite the inane jokes and the deliberate bad acting, there are some violent deaths and a severed head. It may have been funny in 1981 but now it's just a dated piece of dumbness. Also with Kari Michaelsen as their daughter, Rosemary De Camp, Stacey Keach Sr., and Roberta Collins. 

Written and directed by Howard R. Cohen, who made a sequel SATURDAY THE 14TH STRIKES BACK in 1988. He worked a lot for Roger Corman. Later directing SPACE RAIDERS (1983) and DEATHSTALKER 4 (he wrote the other Deathstalker movies too).

Thanks for reading!