Parent Trap III Mary Grand (Bridgette Andersen). Susan was married to Brian Carey (Alex Harvey). They divorced prior to the events of "Parent Trap III", and Susan reverted to using her maiden name, Evers. Hayley Mills returned in 1986 to the Disney Channel when she filmed "The Parent Trap II". She expressed no interest in returning for more sequels. In 1989, Mollie Miller soon began production on the next sequel, "Parent Trap III". Mills returned after her Disney series, "Good Morning, Miss Bliss" had ended. Barry Bostwick was cast as Jeffrey Wyatt and Patricia Richardson as his jealous, snobbish girlfriend, Cassie McGuire. Richardson
The Rat Trap (who also played a supporting role), and Allan Wade. The production starred Robert Harris as Keld (an aspiring young playwright) and Joyce Kennedy as Sheila (a novelist, Keld's fiancée in Act I, his wife in the three subsequent acts). Strong support was given by Adrienne Allen as Ruby (an ambitious musical comedy actress), Mary Robson as Olive (Sheila's flatmate) and Clare Greet as Burrage (the laconic cook-housekeeper). Coward later wrote: 'My first serious play, "The Rat Trap", was produced at the Everyman Theatre while I was on the "Olympic" bound for New York, and so I never saw it...in spite