Mark has written the plays FREUD'S LAST SESSION (Off Broadway Alliance Award), CAMPING WITH HENRY AND TOM (Outer Critics Circle Award and Lucille Lortel Award) FORGIVING TYPHOID MARY, (Time Magazine's "Year's Ten Best") and BECOMING DR. RUTH, the story of Dr. Ruth Westheimer. He also wrote the play, BEST OF ENEMIES (adapted from the novel by Osha Gray Davidson), EARS ON A BEATLE, SCOTT AND HEM and OUT OF GAS ON LOVER'S LEAP. His play RELATIVITY, starred Richard Dreyfuss at Theaterworks in Hartford and Mike Nussbaum at Northlight, in Chicago and broke both theaters' box office records. It was selected for the National New Play Network Rolling World Premieres award and produced across the country. In 2019 Mark's adaptation of John Updike's novel GERTRUDE AND CLAUDIUS premiered in repertory with HAMLET at the Orlando Shakespeare Festival and be presented this summer at the Barrington Stage Company in the Berkshires. A second premiere was WEDNESDAY'S CHILD at the Florida Studio Theatre in Sarasota. With Randy Courts, he has written the musicals THE GIFTS OF THE MAGI, JOHNNY PYE AND THE FOOLKILLER, Award" (Lamb's Theater) and JACK'S HOLIDAY. Mark's musical, STAND BY YOUR MAN, The Tammy Wynette Story was created for Nashville's Ryman Theater (under option for touring). With John Markus wrote the comedy with music, THE FABULOUS LIPITONES. Mark co-wrote the screenplay for Carroll Ballard's Warner Brothers film, DUMA. He directed and produced the documentary, MY DOG, An Unconditional Love Story, featuring Richard Gere, and Glenn Close among others. Television credits include THE COSBY SHOW and for Dick Wolf's CRIME AND PUNISHMENT. He wrote the award winning children's book THREE CUPS and is a member of the Dramatists Guild, the Writer's Guild East and an Associate Artist at the Barrington Stage Company. In 2010, Barrington Stage named their second stage "The St. Germain Stage."