The Five of Me (1981)

Henry Hawksworth (David Birney) is a man menaced by a multiple personality. There is Dana, the conservative family man; Johnny, violent and sociopathic; Peter, creative and childish; and Phil, protective and unemotional. "Dana" falls in love with Ann (Dee Wallace) and marries her. Following a crime, "Johnny" is arrested and tried. In court, Henry's multiple personalities are painfully revealed.