Sandra Diaz-Twine is among those competing in “Survivor”

• Executive producer Mark Burnett’s granddaddy of reality competition shows made its CBS premiere on May 31, 2000, and this new 40th edition, dubbed “Winners at War,” marks the upcoming 20th anniversary in memorable style: by reassembling 20 winners from past seasons to battle it out in Fiji for a $2 million jackpot, the largest in the show’s history. Sandra Diaz-Twine and Boston Rob Mariano, mentors in Season 39, return to compete. (Global & CBS 39 at 8)