Martha Rodgers (Susan Sullivan)Martha Rodgers is the mother of best-selling mystery novelist Richard Castle.She was a semi-successful actress on Broadway. Sadly, her poor luck with men resulted in one of her ex-husband's swindling her out of her money and so she was forced to move in with the very wealthy Castle and his daughter Alexis.Given her background Martha is predisposed to melodrama and is both wise and a wiseacre and enjoys a nice glass of wine often. But, although somewhat self-absorbed, she very much loves her son and is grateful to him and happy to offer him counsel whether he is seeking it or not. She also cares deeply for her granddaughter. .