The Third Alibi
A composer (Laurence Payne) is stuck in a middle-class marriage and finds that his affair with his wife's half-sister (Jane Griffiths) has resulted in a pregnancy. When his wife refuses to give him a divorce he hatches a murder scheme that is too clever by half.
Directors: Montgomery Tully
Writers: Jane Baker, Maurice J. Wilson, Montgomery Tully, Pip Baker
Cast
IMDB: tt0219347