★★★☆☆ USA. 56m. Horror. Directed by Philip Ford. Written by Dorrell McGowan, Stuart E. McGowan (screenplay) and Royal K. Cole, Sherman L. Lowe (story). Cinematography by Reggie Lanning. Edited by William P. Thompson. Music by Edward H. Plumb. Starring Robert Livingston, Lorna Gray, Ian Keith, Thomas E. Jackson, Charles Trowbridge, Earle Hodgins, LeRoy Mason, William Haade, Wilton Graff, Charles Cane.
Someone is breaking into a small medical practice at night and stealing blood, but only of certain types. A young doctor and nurse investigate.