KANSAS CITY — The NBC show “The Biggest Loser” will have a casting call in Kansas City Saturday from 10 a.m. to 6 p.m. at Nebraska Furniture Mart. The show’s producers are looking for outgoing and charismatic family teams who want to lose weight and be famous on TV. Producers will try to see the first 500 people in line. You won’t be able to line up before 7 a.m. Saturday. Bring a non-returnable photo of yourself and your partner.