<P> To keep the series intriguing, each season typically features a new twist to change the format of the game . This began with Big Brother 3 (2002) and the "Expect the Unexpected" twist . Other seasons feature smaller twists than have a smaller impact on the game, usually affecting that sole week . The most notable example of this is Pandora's Box, a twist that originated in Big Brother 11 (2009). The twist sees the current Head of Household for that week being tempted by the box, and can choose to either open the box or leave it . Should a HouseGuest choose to open Pandora's Box, both good and bad consequences could be unleashed into the house; these can affect not only the Head of Household but the other housemates. Similar formats are applied in later seasons, for example, the Den of Temptation introduced in season 19 . Secret powers have also appeared in the past . Mike Malin was the first HouseGuest to receive a secret power, earning the Coup d'État during Big Brother: All - Stars (2006). The Coup d'État allowed the holder to remove one or both nominees from the block on eviction night, as well as choose who is nominated in their place . Malin chose not to use the power, and it subsequently returned during Big Brother 11 (2009) when Jeff Schroeder was given the power by the viewers . Matt Hoffman was given a Diamond Power of Veto during Big Brother 12 (2010), which allowed him to remove one HouseGuest from the block and choose the replacement nominee . During Big Brother 14 (2012), HouseGuest Ian Terry won a second Power of Veto, which could be used the same as the normal Power of Veto . </P> <P> There have been many seasons in which there has been a twist that allows an evicted HouseGuest to return to the game as if they never left . This happened by either a vote or by a competition . From season 18 onward this was referred to as the Battle Back Competition . After being evicted the HouseGuests remained sequestered either separately from each other or (if occurring post-jury) together in the jury house . Those who elected to leave sequester or who leave the game voluntarily were ineligible to return . In Big Brother 3, the first four evictees competed in a competition where they were asked questions about how much they would give up to re-enter the house . The two who gave up the most faced a vote of the house as to who would return . In Big Brother 6, three of the first four evictees were voted on by an America's Vote where the winner returned to the house . In Big Brother 9 and Big Brother 13, the first few evictees were also voted on by the public . Then a house vote was held on whether to bring back the most recent evictee or the person America chose known only to them as the "mystery HouseGuest". During Big Brother 18 and Big Brother 19 there was a competition to determine who would return to the house </P> <P> Jessie Godderz has made the most Big Brother appearances in the show's history, appearing in seasons 10 and 11 as a HouseGuest and in seasons 12--14 and 17--19 in a special guest appearance . </P> <P> Victor Arroyo became the first HouseGuest to reenter the house for a third time in the same season while Paul Abrahamian became the first HouseGuest to make it to the final two twice but still not win . </P>

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