Maureen Jane Teefy and Helen Slater both starred in what 1984 film directed by Jeannot Szwarc? 
Maureen Teefy: Maureen Jane Teefy (born October 26, 1953) is an American actress. Maureen Teefy:  Her films include "Fame" (1980), "Grease 2" (1982) and" Supergirl" (1984). Supergirl (film): Supergirl is a 1984 British superhero film directed by Jeannot Szwarc and written by David Odell, based on the DC Comics character of the same name and serves as a spin-off to Alexander and Ilya Salkind's "Superman" film series. Supergirl (film):  The film stars Helen Slater as Supergirl, along with Faye Dunaway, Mia Farrow and Peter O'Toole, with Marc McClure reprising his role as Jimmy Olsen from the "Superman" films.
Supergirl