Rebecca Budig (Greenlee, AMC), Cameron Mathison (Ryan, AMC) and Corbin Bernsen (ex-Father John, Y&R; ex-Durant, GH) will guest star on a soap-themed episode of ABC's CASTLE to air in March. In the episode, Nathan Fillion's (ex-Joey, OLTL) character investigates a murder on the set of the fictional sudser TEMPTATION LANE. Budig plays Mandy Bronson, a sexually charged actress; Mathison plays Vince Bowers, a TEMPTATION LANE director; and Bernsen plays veteran soap star Lance Buchanan. "I start shooting on Monday," Budig tells Digest, who shares, "I had my costume fitting last week and ran into Nathan. He's just as nice as I remember him to be when he was on ONE LIFE!"