'Ghost Whisperer's' Jamie Kennedy will guest on an upcoming episode of 'Eureka' season 4. Kennedy will play Dr. Ramsey in the episode, who develops an oxygen technology that leaks into the Eureka atmosphere and threatens to destroy the entire town. The episode airs Fri., July 30 on Syfy. [SciFi Wire]

More casting news after the jump.'Ghost Whisperer's' Jamie Kennedy will guest on an upcoming episode of 'Eureka' season 4. Kennedy will play Dr. Ramsey in the episode, who develops an oxygen technology that leaks into the Eureka atmosphere and threatens to destroy the entire town. The episode airs Fri., July 30 on Syfy. [SciFi Wire]

Merrin Dungey ('Alias') has booked a "major recurring role" on 'Hung' season 2. According to reports, Dungey will play Liz, one of Ray's (Thomas Jane) clients who becomes a potential love interest. 'Hung' premieres Sun., June 27 on HBO. [Deadline]

Dane DeHaan has joined the cast of 'In Treatment' season 3, playing one of Dr. Paul Weston's (Gabriel Byrne) new patients. DeHaan, who recently appeared on an episode of 'Law & Order: SVU,' joins the previously cast Irrfan Khan ('Slumdog Millionaire'). Oscar-nominated actress Debra Winger is also in talks to join, though no official decision has been made. [Variety]