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"House"-hold name: Judy Greer as Morgan.
"House"-lights: Morgan shows up at the hospital claiming to have been visited by the Nursing Cat of Death, which House then must disprove. He figures out Morgan has a tumor on her appendix and that the cat is attracted to the warming blankets placed around patients near death.
Out-"House": A talented comedian, Judy Greer can be found in a plethora of movies and TV shows, most notably as Kitty Sanchez on "Arrested Development."