Black Widow

FBI investigator Alexandra Barnes (Debra Winger) becomes obsessed with proving glamorous socialite Catharine Petersen (Theresa Russell) is a murderess, responsible for the deaths of several millionaires who died suspiciously soon after marrying. Believing her to have assumed a new identity each time, Agent Barnes sets out to prove her suspicions, but finds that she too is falling under the spell of her seductive suspect. (Signal One Entertainment)