When Cuddy says that one of the dosimeter badges showed a leak in radiolog, this is a falsehood. Dosimeter badges won't show a leak until they are sent off to be read. Which they are usually sent in once a quarter. There's nothing in them that sets off an alarm when it's around radioactive material.
Actress Jennifer Grey guest stars as a patient in this episode. Her father, Joel Grey, played a patient named Ezra Powell in season three.
House says, "Operation Valkyrie is now in effect." Bryan Singer, an executive producer, directed the movie "Valkyrie."