J.D. Roth

Sept. 30: "Opportunity Knocks" (8 p.m., ABC)

Rather than building a set on a soundstage for this new game show, the set will come to contestants. Host J.D. Roth will knock on a family's door and invite them to play the game, of which the set will then be erected on their front ... more lawn. Questions are based on how well the family members know each other, with correct answers yielding a new refrigerator rolled right into the kitchen or a new car driven into the garage. The show is executive produced by Ashton Kutcher. (ABC)