Wow, what a stupid episode. The writers didn't even attempt to make the patient and the whole Renaissance Festival believable. Not one bit. There have been several 24 episodes this season that were more believable, and maybe even a FlashForward episode or two. Somehow, the patient has been out there pretending to be a knight for 3 weeks straight and clings to chivalry like a real knight. Now give us a real man, please.
I liked the addition of Wilson's ex-wife/current girlfriend Sam, played by Cynthia Watros who was on Lost last week. The scene where Sam confronts House in his office was the best part of the episode and gave House something to do.
House is running on fumes right now and has been for a while. A gimmicky episode like "Knight's Fall" certainly won't help.
Score: 7.7/10