Big Brother 4

 is the fourth season of Big Brother KR.

Twists

 * Two Houses: On premiere night, it was revealed that the 20 houseguests would be separated into two houses. The houses would merge during Week 5.
 * House Swap: On Week 3, the two Head of Households met in the Amethyst Room, a room that connects the two houses. In there, they met Cohen Seabrook, a Big Brother 2 alumni. Cohen explained that they were to choose 4 houseguests on their side to swap to the other side.
 * America's Jury: On Finale Night, viewers voted who they wanted to win.
 * Vote Cancellation: The two finalists each get to choose one jury vote to nullify.