Season 7, Episode 18: "The Dig"
House picks up "Thirteen" -- Dr. Remy Hadley -- upon her release from prison. She asks him to take her to a certain location in order to take care of a personal matter. They pull up to a house in a nice neighborhood, "Thirteen" gets out of the car, walks to the front door, and knocks. A man answers, whom she subsequently knees in the groin. He collapses to the floor; she departs nonchalantly, reenters the car.
"I didn't know you were a Jehovah's Witness," remarks House.
"Yeah, the weak lost faith when Christ didn't return in '75, but I still believe."
House wants to pursue this line of inquiry further, but "Thirteen," like many a good JW, cuts in and says she's starving, and can we get going.