EXCLUSIVE: 24 vet Mary Lynn Rajskub has landed a guest appearance on Fox’s freshman comedy Raising Hope. The actress/comedian will play the never-before-seen wife of Cousin Mike (Skyler Stone). The twist? Rajskub’s character has three other husbands. The episode is scheduled to air in February.

Fresh off his recurring stint on NBC’s Parenthood (where he played Lauren Graham’s boss and boyfriend), Billy Baldwin is headed back to Gossip Girl to reprise his role as William van der Woodsen, father to Serena (Blake Lively) and Eric (Connor Paolo) and the ex-husband of Lily (Kelly Rutherford). He’s slated to appear in at least two episodes of the CW soap.

Lastly, Persons Unknown lead Jason Wiles is set to guest star on ABC’s Castle this February. He’ll play an old friend of Castle‘s (Nathan Fillion) who becomes a prime suspect in a murder. Michael Ausiello is contributing to Deadline.com as he preps for the launch of TVLine.com, a new TV-centric website from MMC.