Big Brother 12

The twelfth season of Big Brother, dubbed as "Havoc Trip", premiered on February 19, 2016 and concluded on March 1, 2016. Amy O'Neill was crowned the winner by a vote of 5-4 against runner-up Cheyenne Bass. O'Neill would have been the second winner to receive 1 million dollars had "The Insider" been either caught or evicted before the 5 weeks expired.

Following their appearance on this season, numerous HouseGuests have went on to appear in various other editions of the series. HouseGuest Marcus Webster returned as a HouseGuest for Big Brother 13, where he placed 7th.

Format
See Season 1 format

Prior to the start of the season, it was announced that the grand prize would be permanently changed to 1 million dollars, with 100 thousand dollars for the runner-up. However, that change is not guaranteed as the prize may be cut in half. One HouseGuest is assigned with the role as "The Insider", whose objective is to wreak havoc inside the house. That person is not eligible to win Big Brother, but will leave the house with half of the promised million if they survive 5 weeks without getting evicted or detected. If "The Insider" is detected, he/she will be expelled from the house and that week's eviction will be cancelled.

Battle of the Block will return this season. After that competition concludes, "The Insider" is required to select a third nominee before the veto competition. Also returning from Big Brother 7 is the secret power of veto, although that veto will be hidden somewhere inside the house.

Insider Duties
Aside from selecting the third nominee, "The Insider" will be given additional ways to affect the game.

HouseGuests
Advertisements initially revealed that 16 HouseGuests would be entering the game. However, it was confirmed on Day 36 that 4 more HouseGuests (Cheyenne, Jordan, Nick, and Sherry) will enter the game following the Day 43 eviction, bringing the total to 20.

Voting
Bold indicates that this HouseGuest was nominated by "The Insider".