|Joan Hackett (1934 - 1983)
Ex-Mrs. Richard Mulligan
|Combat!: The Chateau (1963) [Gabrielle]: Killed in an explosion when the cheateau is bombed. (Thanks to Gordon)
Assignment to Kill (1968) [Dominique Laurant]: Drowned in a bathtub (off-screen) by Leon Greene; her body is shown afterwards when Patrick O'Neal discovers her.
Five Desperate Women (1971) [Dorian]: Killed (off-screen, exact method unclear); her body is shown afterwards when her friends discover her. (Thanks to Dick Hertz)
Deadly Rivals (Rivals) (1972) [Christine]: Burned to death in a fire started by her son (Scott Jacoby) in an attempt to kill her lover (Robert Klein). We see her trapped in the burning building; some subsequent dialogue confirms that she didn't get out.
The Last of Sheila (1973) [Lee]: Wrists slit by Richard Benjamin, after he drugs her and puts her in the bathtub to make her death look like a suicide. (Thanks to Dick Hertz, Steve, and George)
Reflections of Murder (1974) [Claire Elliott]: Dies of a heart attack when Sam Waterston and Tuesday Weld devise a plot to literally scare her to death. (I haven't seen this movie, but I have seen the 1955 film Diabolique, on which it is based.) (Thanks to Dick Hertz)
Mourning Becomes Electra (1978) [Christine Mannon]: Commits suicide by shooting herself. (I haven't seen this version, but I have seen Katina Paxinou's death in the 1947 version.) (Thanks to Rick)