The Broadway production of "The Shadow Box" by Michael Cristofer opened at the Morosco Theater in New York on March 31, 1977, ran for 315 performances and won the 1977 Tony Award for Best Play. Michael Cristofer also wrote the screenplay for the movie version.
The play "The Shadow Box" won the Pulitzer Prize in Drama in 1977.
The film cast includes two Oscar winners: Joanne Woodward and Christopher Plummer; and two Oscar nominees: Sylvia Sidney and Melinda Dillon.
Christopher Plummer worked with Robert Urich's wife, Heather Menzies, in "The Sound of Music".