... The show gets additional zing from Castle's ex-wife and editor (Monet Mazur), his plucky teenage daughter (Molly C. Quinn) and "Dharma & Greg's" Susan Sullivan, who romps through her scenes as Rick's madcap, live-in actress mom.
...Susan Sullivan (Greg's mom on "Dharma and Greg") whoops it up as Castle's Broadway-diva mother who trolls his book-launch party looking for a new beau.
"I just got a hit on my graydar," she says, eyeing an older gentleman. "Stand back, kids. Momma's going fishing."Full Article
...It might also be nice to see Rick get roughened up a little. Though he's presented as something of a bad boy, the character is almost too nice, raising a stable teenage daughter (Molly Quinn) and putting up with his ex-actress mom (Susan Sullivan, who could challenge 90210's Jessica Walter to a boozy grandma-off) crashing at his house.