Dr. Henry Armitage, an expert in the occult, goes to the old Whateley manor in Dunwich looking for Nancy Wagner, a student who went missing the previous night. He is turned away by Wilbur, the family's insidious heir, who has plans for the young girl. But Armitage won't be deterred. Through conversations with the locals, he soon unearths the Whateleys' darkest secret — as well as a great evil.
Sandra Dee
as Nancy Wagner
Dean Stockwell
as Wilbur Whateley
Ed Begley
as Dr. Henry Armitage
Lloyd Bochner
as Dr. Cory
Sam Jaffe
as Old Whateley
Joanne Moore Jordan
as Lavinia Whateley
Donna Baccala
as Elizabeth Hamilton
Talia Shire
as Nurse Cora
Michael Fox
as Dr. Raskin
Jason Wingreen
as Sheriff Harrison
Barboura Morris
as Mrs. Cole
Beach Dickerson
as Mr. Cole
