Kaysar Ridha re-enters in Season 6, Episode 15.
Season 9 was special for Big Brother because it gave viewers complete control in choosing which evicted HG they wanted to re-enter the game. When the big moment came, fans had to pick between Kaysar Ridha, Eric Littmann, and Michael Donnellan.
And, with a majority of the votes, Kaysar was the one who gave the remaining Houseguests a big surprise when he busted through the front door again and resumed his gameplay.
Watch the full episode where Kaysar Ridha returns to the house in Season 6!