"My buddy Jeff called and he knew," Mariano tells EW. "I told him time and time again that I was done, I felt like after Redemption Island, I won the show, that was my goal all along. And I just felt fulfilled and that it would have to take something unique to get me back there, and Jeff called with this idea about the Island of the Idols." Diaz-Twine adds: "When he said we didn’t have to go to challenges, I was like “I am so there!’ Plus, it was Boston Rob. I’ve always felt like if there was anyone that I really, really would enjoy being out there with for that amount of time and I could get along with them very well with no issues, it would be Rob. So I said yes right away. I didn’t even have to think about it."