Hugh Laurie Dr. Gregory House Actor Lisa Edelstein Dr. Lisa Cuddy Actor Omar Epps Dr. Eric Foreman Actor Robert Sean Leonard Dr. James Wilson Actor Jennifer Morrison Dr. Allison Cameron Actor Jesse Spencer Dr. Robert Chase Actor Howard Hesseman Henry Errington Guest Star Keri Lynn Pratt Amy Errington Guest Star Greg Grunberg Ronald Neuberger Guest Star Adam Busch Tony Guest Star Ron Perkins Dr. Ron Simpson Guest Star Yvette Nicole Brown Ellen Stambler Guest Star Jean St. James Cecile Guest Star Craig Patton 2nd Table East Guest Star Marcie Lynn Ross 2nd Table West Guest Star Susan Grace 1st Table North Guest Star Noel Conlon 1st Table East Guest Star Bobbin Bergstrom ER Doctor Guest Star Stephen DeCordova 2nd Chief Surgeon Guest Star Paul Attanasio Executive Producer Katie Jacobs Executive Producer David Shore Executive Producer Bryan Singer Executive Producer David Semel Director Matt Witten Writer