"Wheel of Fortune" has been on the air for more than three decades, that's 32 years of television viewers sitting at home trying to solve the puzzle.App users: Tap here for videoHost Pat Sajak said the secret to the show's success is a puzzle that may never be solved.View behind the scenes images"The short answer is I don't have a clue," Sajak said. "We are playing hangman. It's a simple game. Why it's become part of people's life cycle, I don't know."Behind the Scenes: Wheel of Fortune secrets | Vanna's dressesThe show's executive producer, Harry Friedman, agrees.Hangman with prizes is the hook, but Sajak and Vanna White are what keeps viewers coming back."Even though they are too modest to say so, Pat and Vanna are just a huge part of the show's success. You've got to be pretty special to be welcomed into everyone's home every night practically for 32 years," Friedman said.Six episodes are taped at a time. They pause for commercials and take a 15-minute break at the end of each show.About 160 audience members look on as the staff and crew readies the huge sound stage for the next segment."We have over a 110 staff and crew, they know their jobs and responsibilities really, really well. There's a since of pride about the 'Wheel of Fortune' family and obviously you've picked up on that," Friedman said.The audience is prepped before the show and they are cautioned."They are very respectful of the game play and the contestants and (shouting out the answers) has happened, but I think not maliciously, but out of enthusiasm, probably for no other reason," Friedman said."People come up to me every day and say, 'I used to watch with my grandmother. My kids learned the alphabet from it.' Spans generations now," Sajak said. "It will outlast Vanna and me. We're a big part of it, people like us, and I appreciate that, but they like the game. Looks like it will be here for a long, long time.""Wheel of Fortune" and "Jeopardy" shoot on adjacent sound stages at Sony Studios, but share the same crew and control room, which means they can't shoot the shows on the same day."Wheel" shoots on Thursday and Friday and "Jeopardy" shoots Tuesday and Wednesday.