The Killing star Kristin Lehman is joining the cast of Castle for a potentially recurring role. Lehman has been cast as a seriously sexy art insurance investigator with a checkered past, cue the Thomas Crown Affair. Lehman's character takes a hearty liking to Castle and will serve as a new love interest, or will she just be a distraction. Only season 4 will tell and it kicks off September 19th on ABC.
Source: TV Line