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)
David Navratil
Seen this in 1957 at the movies. I have listed this as my favorite vampire movie of all time. Fast pace, suspenseful and makeup was good. The scene when the vampire is chasing his nurse down the sidewalk to her house scared the heck out of me (10 yrs old then), also the scene at night in the vamp...