'The Following' Actor Has To Film Every Scene Twice To Play Twins

One of Fox's most-watched shows right now is "The Following."  The series follows FBI agent Ryan Hardy (Kevin Bacon) as he tries to track down cult leader Joe Carroll (James Purefoy). Now in season 2, perhaps the biggest additions to the show have been murdering twins Luke and Mark who are both played by actor Sam Underwood.  To make you believe you're actually seeing double on screen, the show has to film each scene with the actor twice. Director and executive producer Marcos Seiga tells Busi...