After a year's hiatus, 2010 winner "Jamie Oliver's Food Revolution" returns to contend for its second and final season. It is the only past winner in the running.
"Antiques Roadshow" is looking for its first win on its eighth consecutive nomination.
"Mythbusters" is hoping that fourth time is the charm while "Undercover Boss" contends for the third straight year.
The two newcomers to the category both contend for their third season -- "Shark Tank" and "Who Do You Think You Are?"