On the eve of their anticipated panel, castmembers John Barrowman, Eve Myles, Mekhi Phifer, Alexa Havins and Bill Pullman along with writer Jane Espenson shocked Comic-Con goers with  a surprise visit to an advanced screening of episode 103 of STARZ’ “Torchwood: Miracle Day,” on Thursday, July 21st at 9:30pm PT at San Diego Comic-Con.  Below...