Big Brother 13 (American season)

[3] The nominee with the greater number of votes will be evicted from the House on the live Thursday broadcast, exiting to an adjacent studio to be interviewed by Chen.

These "Jury Members" will be sequestered in a separate house and will not be allowed to watch the show except for competitions and ceremonies that include all of the remaining HouseGuests.

The third change was the introduction of the "Big Brother Golden Key" which was given to the remaining member of the nominated pair that survived an eviction vote or lost a partner due to an expulsion or voluntary exit.

As part of the twist for the season, a selection of former HouseGuests, called "Dynamic Duos" by the producers, re-entered the House for another chance to win the grand prize.

[22] HouseGuests Brendon Villegas and Rachel Reilly, Jeff Schroeder and Jordan Lloyd, and Dick Donato and his daughter Daniele entered the house later that night.

[30] Realizing that the new HouseGuests would be nominated for eviction, Cassi, Dominic, Keith, and Lawon formed "The Regulators" alliance, which featured one member from each of the four new duos.

[35] The Veterans alliance later decided they wanted Porsche to receive a Golden Key in an attempt to gain her vote for future evictions.

[39][40] He later revealed in an interview with People that when the producers called him into the Diary Room on Day 6, though the preliminary tests were inconclusive, they informed him there was a possibility that he was HIV-positive; this was later found to be the case.

[48] On Day 13, Keith became the first HouseGuest to be evicted from the house in a vote of six to four; as she lost her partner, Porsche received the second Golden Key of the season.

Brendon and Rachel, upset with Jordan's nominations, later decided they would use the Power of Veto to remove Adam and Dominic from the block should they win.

[72] David Hasselhoff, who was the correct answer, later entered the house and announced that the winner would earn the right to watch an episode of the television series Same Name.

[84][85][86] Following Dominic's eviction, it was confirmed that the Golden Key twist was officially over, meaning all HouseGuests were competing in the Head of Household competition excluding Rachel.

[92] Daniele soon decided she wanted to target Brendon and Rachel for eviction, and later made a deal to keep Jeff and Jordan safe in exchange for safety the following week.

The following day Jeff won the Power of Veto competition, Big Brother Odyssey, by being the first HouseGuest to roll a ball back and forth with the first person to reach 300 points declared the winner.

During the competition, HouseGuests competing won a variety of prizes including, a Caribbean Vacation for Kalia, $5,000 for Jeff, a Veto ticket for Daniele ensuring her a spot in next week's Veto competition, 24-hour solitary confinement for Shelly with the privilege of receiving a phone call from home, and a "humilitard" to be worn by Jordan for a week.

HouseGuests had to retrieve a ping-pong ball from within a container, by using a small cup to transfer Liquid Detergent across the yard while on a slippery surface.

The HouseGuest then competed in the second HoH competition of the week, Big Brother Fortune Teller, was won by Adam on Day 68.

[109] Casting for season began in mid-April with applications and video tape submissions that did not have a set deadline.

[111] Robyn Kass, casting director for Big Brother, revealed on her Twitter account on June 8, 2011, that the semi-finalist were contacted while no final decision on who would be selected for the program had been made.

This season featured no changes to the schedule that was used in the previous edition, with episodes airing on Wednesday, Thursday, and Sunday each week.

[115] The Thursday episode, which aired at 9 pm Eastern Time, featured the live eviction and subsequent Head of Household competition taking place.

The Sunday episode, which aired at 8 pm Eastern Time, featured the food competition and nomination ceremony, as well as some highlights from the previous days.

This season did see the return of the Big Brother: After Dark spin-off series, which aired on Showtime Too nightly from midnight to 3 a.m. Eastern Time.

[122] Other features included a video trivia game and the "Big Brother Ultimate Fan" contest where the winner was able to attend the season finale meet the HouseGuests.

After the season premiere, Jeff Schroeder made several controversial comments regarding the sexual orientation of the fictional character Albus Dumbledore from the Harry Potter series on July 12, 2011 (which was Day 10 inside the house).

CBS released a public statement the following day regarding Jeff's comment, stating that any views or opinions expressed by the HouseGuests are those of the individual and not the network or producers of the program.

[132] The Gay & Lesbian Alliance Against Defamation (GLAAD) responded to the controversy by referring to Jeff as an "openly anti-gay reality star".

After recounting the various programs he has taken part of (a contestant in The Amazing Race, host of the second season of Around the World for Free web series and two seasons of Big Brother), GLAAD alleged that the network knew Jeff would bring his "openly anti-gay attitudes" back to the program and questioned if the network had cast him for that purpose.

As Head of Household for the week, Porsche Briggs openly identified her targets as the last two returning HouseGuests, Jordan Lloyd and Rachel Reilly.

Fans suspected that the return of the duos twist was a ploy by production to keep both women in the game, as the remaining HouseGuests had made a contingency plan to vote out whichever veteran did not win the Power of Veto.