A small town doctor mistakenly ingests an experimental drug made from the blood of vampire bats which transforms the kindly medic into a bloodthirsty monster.
John Beal
as Dr. Paul Beecher
Coleen Gray
as Carol Butler
Kenneth Tobey
as Buck Donnelly
Lydia Reed
as Betsy Beecher
Dabbs Greer
as Dr. Will Beaumont
Herb Vigran
as Sgt. George Ryan
Paul Brinegar
as Willy Warner
Ann Staunton
as Marion Wilkins
James Griffith
as Henry Winston
Hallene Hill
as Mrs. Carrie Dietz (uncredited)
Raymond Greenleaf
as Autopsy Surgeon (uncredited)
Wood Romoff
as Dr. Matthew J. Campbell (uncredited)
