The Night Strangler is the sequel to the enormously successful 1972 TV movie The Night Stalker. Darren McGavin returns as seedy reporter Carl Kolchak, who previously ran into conflict when Las Vegas authorities refused to acknowledge Kolchak's uncovering of a modern-day vampire. Now he's in Seattle, on the trail of a mysterious strangler who drains the blood of his victims. Kolchak's quest takes him to a hidden underground city beneath Seattle and the bizarre residents therein. Margaret Hamilton (The Wizard of Oz) is seen briefly as an expert on alchemy; John Carradine also makes cameo. The success of this telemovie and its predecessor inspired a brief 1974 TV series, Kolchak: The Night Stalker, also starring McGavin.