During May sweeps, CBS plans to air “Survivor: Back From the Outback,” in which all 16 contestants of the current reality series will be shown returning to their hometowns, the network has announced. The one-hour show is set to air 8 p.m. ET May 10, a week after the $1 million winner in named on “Survivor: The Australian Outback.” It also will include interviews with contestants from last year’s original “Survivor.” The special will air opposite a special 30-minute episode of the NBC game show “Weakest Link,” which features a handful of original “Survivor” players.