Season two of AMC hit “Mad Men” will premiere at 10 p.m. July 27. All 13 episodes of the drama’s new season will air in that Sunday-night timeslot.Star Jon Hamm won a Golden Globe for lead actor in a drama, while the skein’s scribes took home the Writers Guild Award for new show. To help viewers catch up, AMC will air a “Mad Men” marathon of the entire first season on July 20. Skein is produced by Lionsgate and exec produced by Matthew Weiner. Over at Sci Fi Channel, the net announced that “Ghost Hunter International” and “Scare Tactics,” to be hosted by Tracy Morgan, will return on July 9. Other series returning this summer include the fifth season of “Stargate Atlantis” (July 11) and third of “Eureka” (July 29).