Multiple Emmy winner Carl Reiner has been tapped to appear in House's fifth-season finale, according to the Los Angeles Times.
In the episode, entitled "Both Sides Now," Reiner (The Dick Van Dyke Show, the Ocean's 11 trilogy) will play a clinic patient Cuddy uses to get House's attention and force him to complete his clinic hours.
Elsewhere in the finale, House treats a man whose left and right brain operate independently. The man lives with two different personalities and has no control over his actions, making treatment difficult. Cue some "alternative methods."