Survivor: Cambodia — Second Chance is the 31st season of the American CBS competitive reality television series Survivor. Unlike previous seasons, which were completely cast by producers, this season featured 20 returning contestants chosen by an online public vote. The ballot, with the 32 finalists that were considered for this season, was revealed on May 6, 2015, the same day that voting began. The final cast was revealed on May 20, at the reunion of the preceding season. After the reveal occurred, the chosen cast members immediately began the trip to Koh Rong, Cambodia, where the season was filmed. The season premiered on September 23, 2015, and concluded on December 16, 2015, when Jeremy Collins was declared the winner over Spencer Bledsoe and Latasha "Tasha" Fox in a unanimous 10–0–0 jury vote.

Survivor: Worlds Apart — White Collar vs. Blue Collar vs. No Collar is the 30th season of the American CBS competitive reality television series Survivor, which premiered on February 25, 2015, with the season finale on May 20, 2015. It was the fourth Survivor season filmed in San Juan del Sur, Nicaragua, the same location as Survivor: Nicaragua, Survivor: Redemption Island, and Survivor: San Juan del Sur, and features three tribes of six new players divided by social class: white collar, blue collar, and no collar. This season introduced the concept of an extra vote, in which one player can vote twice at a single Tribal Council, which was offered during the season's Survivor Auction. This season also saw the return of the firemaking tiebreaker challenge in the final four, last used in Survivor: Gabon.