Dark Intruder

Atmospheric TV movie about a Sherlock Holmes type (Leslie Nielson) who occasionally assists the San Francisco police with serious crimes. Set in 1890, the whole thing feels very Jack the Ripper-ish, and there is a Mr. Hyde styled monster running loose in town seemingly killing people at random. Nielson's breezy private detective eventually puts two and two together, and realizes the creature has something very specific in mind with each murder. Mark Richman plays a troubled acquaintance who may hold the key to the mystery, and Werner Klemperer of all people plays the Mr. Hyde-ish killer. Tame by today's standards, this low-budget but fanciful tale still packs a punch. Later released theatrically. Too bad it wasn't shot in color. Nielson, whose hair was still dark in those days, is an absolute hoot.