HISTORY®’s HIT SERIES ‘VIKINGS’ RETURNS TO SAN DIEGO COMIC-CON ON FRIDAY, JULY 20 WITH CAST PANEL IN BALLROOM 20, CONVENTION FLOOR BOOTH AND AN EXCLUSIVE LOOK AT WHAT’S TO COME IN THE NEW SEASON NEW UFO DRAMA SERIES ‘PROJECT BLUE BOOK’ TO MAKE SDCC DEBUT ON SATURDAY, JULY 21 WITH PANEL AND OUT OF THIS…