 While teaching at Sarah Lawrence, Leach met then-students Brian De Palma and Cynthia Munroe.In collaboration with De Palma and Munroe, he produced, directed, and wrote the screenplay for the 1969 film "The Wedding Party", whose cast included a young Robert De Niro and Jill Clayburgh.He also directed the films "All's Well That Ends Well" (1978) with Frances Conroy for television and a straight-to-video version of "Coriolanus" (1979) with Denzel Washington and Morgan Freeman.