Episode Knight Fall Adaptation: House MD Episode: 6x17 Airdate: 19 April 2010 IMDb: Knight Fall (link not verified) Previous: Lockdown Next: Open and Shut Cast Hugh Laurie as Dr. Gregory House Robert Sean Leonard as Dr. James Wilson Ryan Radis as Apothecary Melissa Kestin as Baker's Assistant Cynthia Watros as Sam Carr Jesse Spencer as Dr. Robert Chase Kara McLeod as Ren Faire Craftsman Lisa Edelstein as Dr. Lisa Cuddy Reid Gormly as Doctor Michael Weston as Lucas Douglas Omar Epps as Dr. Eric Foreman Olivia Wilde as Dr. Remy 'Thirteen' Hadley Keith Blaney as Medieval Man Wes Ramsey as Miles Bobbin Bergstrom as Nurse Taliesin Jaffe as Renaissance Faire Actor Miranda Christine as Renaissance Faire Actor Carey Embry as Sarah Sarah Jones as Shannon Peter Jacobson as Dr. Chris Taub Noah Segan as William