Jane Espenson stepped aside as showrunner "to focus more on the writing". At the beginning of season 1.5, she was replaced in that position by newly-hired executive producer and self-professed BSG geek Kevin Murphy, a writer, producer and composer who had previously worked on "Desperate Housewives", "Reaper" and "Reefer Madness: The Movie Musical" (Hollywood Reporter, io9, Variety)
John Pyper-Ferguson: Some people recognized him in the latest trailer already, and now he's officially listed as playing Tomas Vergis in at least five episodes (the Vergis Corporation is where the Adamas stole the processor from)