A young man is shot in Los Angeles, but he doesn't die -- this is Miracle Day. When it's revealed that he knew the Miracle was coming, his sister, Holly Mokri, sets to work to figure out what he knew and why he was silenced. And back in 2007, Gwen Cooper saw Jack Harkness abducted in front of her -- what happened to him and how is it tied to the events in LA four years later?