Witchfinder General is a 1968 British horror film directed by Michael Reeves and starring Vincent Price, Ian Ogilvy, and Hilary Dwyer. The screenplay was by Reeves and Tom Baker based on Ronald Bassett's novel of the same name. Made on a low budget of under £100,000, the movie was co-produced by Tigon British Film Productions and American International Pictures. The story details the heavily fictionalised murderous witch-hunting exploits of Matthew Hopkins, a 17th-century English lawyer who claimed to have been appointed as a "" by Parliament during the English Civil War to root out sorcery and witchcraft. The film was retitled The Conqueror Worm in the United States in an attempt to link it with Roger Corman's earlier series of Edgar Allan Poe–related films starring Price—although this movie has nothing to do with any of Poe's stories, and only briefly alludes to his poem.