Part of the reason why Survivor is such a beloved show is because we generally know what to expect when we watch it. While the show is known for its surprising twists, viewers also know that the season will feature immunity challenges, tribal councils, a merge, and a final tribal council where the jury gets to speak their peace—and this all takes place over 39 days.

However, Survivor fans might not know that there's one season that lasted for longer than 39 days. Here's what we know about the filming time of Survivor: The Australian Outback.

Why was Survivor: Australian Outback 42 days?

Australian Outback lasted longer than any other Survivor season for one simple reason. After the success of Borneo, Survivor's first season, the team behind the show decided to extend the season from 39 to 42 days to offer viewers something different from the first season. It's kind of like when a movie franchise adds more explosions and drama for its second film.

Or, as a user on Reddit explained, "Because Survivor was the most popular show in the U.S. at the time and they wanted to advertise how big the 'sequel' was. 'Bigger challenges! Stranded for even longer! More drama! The first medical evacuation!'"

However, the Australian Outback ended up being a tad too drawn out, and during the two-hour finale, there was only one immunity challenge left.

After the season, Survivor decided that 39 days should be the standard going forward, and the show hasn't wavered since.