In 1975, his first play The Exorcism was performed as part of an evening of one-acts.
During this time, Keyes continued as both an actor and director, appearing in such works as Tiger Skin and Margeurite, and staging the highly idiosyncratic Gangsters, by Tom Thorton, first at Towson University's theatre department and then at Corner Theatre.
In 1983, Keyes appeared at New York's Theatre Off Park in an off-Broadway production of The Water Hen by Stanislaw Ignacy Witkiewicz, under the direction of Brad Mays.
Shortly thereafter, he went to work on a screenplay with the working title of The Return of Grayson Porterhouse.In 1987, the finished script went into production with the new title Stage Fright,[1][2][3][4] again with Mays directing.
In March 2000, Stanley Keyes' play Dragon Slayers was presented in Hollywood, California, where it ran for six weeks.