Marsha Mason is involved in various theater productions, including directing "The Roommate" at Arizona Theatre Company and participating in a reading of "The Pancake Club" at Westport Country Playhouse. She has also joined a production at Westport Country Playhouse alongside James Naughton. Additionally, Mason has stepped in to replace Mia Farrow in a Broadway production of "The Roommate", although details of the production and her involvement are not entirely clear.