The Saboteur was the twist of Big Brother 12. The Saboteur was to wreak havoc on the houseguests by sabotaging a group, an individual, or the house as a whole by causing paranoia or physically sabotaging the game. The Saboteur would be granted $50,000 if he or she made it to the half-way point in the game, five weeks, undetected. The first Saboteur was Annie Whittington and the second Saboteur was Ragan Fox. The Saboteur communicated to the houseguests through the television in the living room while disguised behind static and appeared only as a silhouette. The Saboteur would threaten the houseguests and warn about upcoming sabotage.
Annie Whittington was the first evicted houseguest. Had she made it to Week Five, she would have collected $50,000 for being the Saboteur. However, she was evicted after committing only three acts of sabotage. The houseguests did not suspect her as the Saboteur when they evicted her, though she was one of the three people thought possible of being the Saboteur, the others being Andrew Ian Gordon and Brendon Villegas.
The New Saboteur was an America's Choice vote. America voted for Ragan Fox to be the New Saboteur if the Head of Household opened Pandora's Box in Week Five. Ragan was to commit three acts of sabotage for two weeks, and if he remained in the house, he would receive $20,000 as a reward. Ragan successfully completed his two week reign of treachery and won the prize money. The houseguests did not suspect Ragan and did not seem to invest any anger toward the Saboteur. The houseguests were very surprised to learn that he was the Saboteur during the finale.