Captain Kronos – Vampire Hunter is a 1974 British swashbuckling action horror film, written and directed by Brian Clemens, produced by Clemens and Albert Fennell for Hammer Film Productions, and starring Horst Janson, John Carson, Shane Briant, and Caroline Munro. The music score was composed by Laurie Johnson, supervised by Philip Martell. Belatedly released on 7 April 1974, the film was intended as the first in a series focused on the title character and his companions. Due to the film's violence and sexual subtext, Captain Kronos was rated R in North America. This was Clemens' only film as a director. Plot Dr. Marcus (John Carson) calls in Captain Kronos (Horst Janson), his Army Brother, to his village which is plagued by mysterious deaths marked by highly accelerated aging. Kronos and his companion, the hunchback Professor Hieronymus Grost (John Cater), are professional vampire hunters. Grost explains to the initially skeptical Marcus that the dead women are victims of a vampire who drains not blood but youth, and that there are "as many species of vampire as there are beasts of prey". The discovery of another victim confirms Grost's explanation. Along the way, Kronos and Grost take in a local Gypsy girl, Carla (Caroline Munro), who had been sentenced to the stocks for dancing on the Sabbath. She repays them by helping them hunt the vampire; she later becomes Kronos's lover. Grost and Kronos conduct a mystical test that indicates the presence of vampires. Their findings are contradicted by an eyewitness who claims to have seen "someone old, very old", whereas a youth-draining vampire should appear youthful. Marcus visits the family of his late friend, Lord Hagen Durward, and speaks with Durward's son, Paul (Shane Briant), and his beautiful sister Sara (Lois Daine). He must leave before speaking with the bed-ridden Lady Durward (Wanda Ventham). While riding through the woods, Marcus encounters a cloaked figure that leaves him shaken, and he finds blood on his lips. At a tavern, Kronos defeats thugs led by Kerro (Ian Hendry), who were hired by Lady Durward's coachman to murder him. Kronos, Grost, Marcus and Carla set up a network of alarm bells in the woods to announce the passage of vampires. Meanwhile, a large bat attacks and kills a young woman. Marcus realises that he has become a vampire and begs Kronos to kill him. After various methods (including impalement with a stake and hanging)