Big Brother 5

Big Brother 5 was the fifth season of the reality television series Big Brother. It aired for 82 days, concluding when Kristina Lewis was crowned the winner with four out of seven votes from the jury.

Big Brother 5 was the same as Big Brother 4, in regards to the Power of Veto, Head of Household, Nomination process, eviction, and jury. This season had 14 houseguests, so they were evicted at a quicker rate than before, sometimes multiple evictions in one week.

In the fifth season, only six players would participate in the Power of Veto competition. The HOH and both nominees would choose a houseguest to also compete.

Twists/Changes

 * Only Six Power of Veto Players: Unlike in previous seasons where all Houseguests competed in the Veto Competition, only six players would be allowed to compete; The Head of Household, the two nominees, and three players selected by each of them respectively.
 * Project DNA: Do Not Assume: There were two sets of relatives that may or may not know are playing together.
 * Twin Twist: Courtney & Jessica: Although the houseguests were informed that some of their fellow houseguests had identical twins, they were not informed that Courtney Allen had a twin. In fact, Courtney and her identical twin Jessica Allen would switch places in the diary room from time to time during the first four weeks. They were not discovered, so Jessica was let into the house as a permanent player in Week 5.
 * Unknown Relatives: Caitlin & Colby: Caitlin Ray and Colby Varela did not know that they were biological siblings until they talked and figured out they were related. Their fellow house guests knew this as well.
 * Double Eviction Week: On week 9, for the first time in Big Brother history, two houseguests would be evicted within one week.

Alliances

 * The Man Clan (Alec, Colby, Reed, and Zach)
 * Family Pack  (Caitlin, Colby, Kristina, Lisa, and Ron)
 * Zach's Attack  (Caitlin, Courtney, Jessica, Kristina and Zach)

Week 1
Houseguests partnered up to compete in the first HOH competition. As there was an uneven number of players, Colby Varela chose to sit out. Reed Holsman ultimately outlasted the other houseguests, meaning he and his partner Zach Lamb had won the competition. To decide which of the two would be the HOH, Colby asked Zach a question about himself. If Zach answered correctly he would be HOH, if he answered incorrectly, Reed would be HOH. Zach answered correctly, earning the title of HOH for the week. During the week, The Man Clan alliance was formed; it consisted of Colby, Reed, Zach, and Alec Caprin. After Caitlin Ray caused a fire and almost burnt the house down while cooking, Zach decided to nominate her for eviction. Along with nominating Bridgette Wainer after she was caught drinking Alec's plasma. At the POV competition, Caitlin won and chose to use the veto on herself. Zach chose to nominate Kristina Lewis as a replacement because the house viewed her as annoying. Bridgette was evicted in a unanimous vote.

Week 2
Following Bridgette Wainer's eviction, Omar Fields won the "Majority Rules" HOH competition. Prior to the nomination ceremony, Reed Holsman tried to convince Omar to be part of the Man Clan alliance, but Omar showed hesitation. At the nomination ceremony, Omar chose to nominate Reed and Alec Caprin for eviction, calling out their alliance with Zach Lamb and Colby Varela in the process. Reed won the POV competition, narrowly beating Kristina Lewis. Reed chose to save himself from the block, and Omar named Colby as the replacement nominee. The day before the eviction, Lisa Ridgeway wanted to sway the house to evict Alec, citing him as the bigger threat. Alec was evicted in a six to three vote.

Week 3
Following Alec Caprin's eviction, Zach Lamb won the "High/Low" HOH competition. He chose to nominate Omar Fields and Joey Thomas for eviction, and stated that Omar was after the Man Clan and wanted him out. Prior to the POV competition, Joey made a deal with Courtney Allen that if she won the veto, she would use it on him. Unknown to him, Joey made the deal with her twin, Jessica Allen. Courtney won the POV and decided to leave the nominations intact, much to Joey's anger. It seemed like Omar was going to get evicted, but when Joey started to lambast Courtney for not saving him, Courtney decided to use it to her advantage by fake crying and garnering sympathy to get Joey out. Courtney's plan worked when Joey was evicted in a six to two vote; only receiving the votes of The Man Clan.

Week 4
Following Joey Thomas's eviction, the houseguests competed in the "I Have a Secret" endurance HOH competition. After a seven hour struggle, Caitlin Ray won the competition, becoming the first female HOH of the season. Not wanting to go after her brother, Caitlin targeted the "two strongest competitors" in the house, nominating Zach Lamb and Reed Holsman for eviction. Prior to the veto competition, Lisa Ridgeway formed an alliance with Caitlin, Colby Varela, and Ron Caldwell. Caitlin brought in Kristina Lewis and they dubbed it "Family Pack." Zach won the POV and chose to use it on himself; Caitlin named Samantha Hughes as her replacement nominee. Despite Zach's pleas, Reed was evicted in a five to two vote; only receiving the votes of Zach and his showmance Kristina. Colby ultimately stuck with the Family Pack alliance.

Week 5
Following Reed Holsman's eviction, the "Twin Twist" was revealed to the HouseGuests and Jessica Allen entered the game. Lisa Ridgeway won the "Home Is Where the Answer Is" HOH competition. While planning for nominations, Lisa wanted to be the first HOH to backdoor someone, namely one of the twins. Lisa planned to put up two people from her alliance, and they would each pick another member from her alliance to play for the POV. This ensured that all six players in the Veto competition were on Lisa's side. Then, the Veto would be used and one of the twins would be nominated in their place. At the nomination ceremony, Lisa nominated Colby Varela and Caitlin Ray. But during the veto pickings, Colby chose Zach Lamb to play, which was not part of the plan. Zach won the POV, but chose not to use it because he lost his trust in Colby when he evicted Reed. This meant that Colby or Caitlin would be evicted. Zach managed to create an alliance with the twins and Kristina Lewis to save Caitlin; Kristina's ally. Colby was evicted from the house in a four to three vote.

Week 6
Following Colby Varela's eviction, Zach Lamb won the "The Puck Stops Here" HOH competition. He nominated Ron Caldwell and alliance rival Lisa Ridgeway for eviction. He later revealed his intentions were to break up the alliance Lisa created and sway some of the members to his side. Zach went on to win the "A Very Veto Christmas" POV competition. Lisa tried to mend bridges with Zach, hoping he would save her with the veto. But he ultimately chose to discard it. Kristina Lewis and Caitlin Ray considered saving Lisa because they viewed her as a scapegoat for future evictions. However, Lisa was evicted from the house in a five to one vote.

Week 7
Following Lisa Ridgeway's eviction, Samantha Hughes won the "Who Said It?" HOH competition. To avenge Lisa's wishes, Samantha nominated Courtney Allen and Jessica Allen for eviction, due to them being an unbreakable duo. Prior to the POV pickings, everyone agreed to not pick Zach Lamb so everyone has an equal chance to win. Ron Caldwell won the POV but decided to discard it. This meant that one of the twins would be evicted. The house agreed to evict who they thought was the stronger player in competitions. Ultimately, Courtney was evicted in a unanimous vote.

Week 8
Following Courtney Allen's eviction, Kristina Lewis won the "Putting for Power" golf based HOH competition. She nominated Omar Fields and Ron Caldwell for eviction, stating she has bonded with them the least in the house. Jessica Allen was the winner of the POV competition. Jessica later chose to not exercise the power. Samantha Hughes pleaded to Kristina to spare Ron on eviction night, which Kristina agreed to. Omar was evicted in a unanimous four to zero vote.

Round 1
Following Omar Fields's eviction, the house learned it would be a Double Eviction Week, and that someone else would be leaving the following day. Jessica Allen then won the "Chemical Reaction" HOH competition. She later chose to nominate Ron Caldwell and Samantha Hughes for eviction, due to them being the outsiders in the house. Zach Lamb won the POV competition. At the Veto ceremony, Zach decided not to use it. Ron was evicted from the house by a unanimous vote.

Round 2
Following Ron Caldwell's eviction, Caitlin Ray won the "Ready, Set, Gone" HOH competition. She chose to nominate Jessica Allen and Samantha Hughes for eviction. Before the Veto competition, Caitlin told the women that she wanted to evict Zach Lamb from the house due to his competition record, and she also wanted to be the first person to successfully backdoor someone. Samantha won the POV and chose to save herself from the block. Caitlin then nominated Zach as the replacement. Zach was evicted in a unanimous two to zero vote.

Week 10
Following Zach Lamb's eviction, Kristina Lewis won the "Before or After" HOH competition. She nominated Caitlin Ray and Samantha Hughes for eviction. Her plan was to hide her final two alliance with Caitlin and gain more trust with Jessica Allen. Kristina won the "Socket to Me" Final POV competition and considered saving Caitlin from the block. However, Jessica promised to take Kristina to the final two if she chose to discard the veto. Kristina honored this deal and chose to discard it, giving Jessica the sole vote to evict. Jessica decided to remain loyal to her alliance member Caitlin and chose to evict Samantha.

Week 11
The final HOH competition is played out in three challenges, to give the remaining houseguests a fair shot at securing a place in the final two. In the "Earthquake" endurance portion of the Final HOH competition, Kristina Lewis beat out Caitlin Ray and Jessica Allen. Caitlin later won "Twisted Twosomes", the second part of the final HOH competition. Caitlin and Kristina faced off in the "Encore Presentation" final portion of the Final HOH competition, with Caitlin reigning victorious. Wanting to stay loyal to her final two deal with Kristina, Caitlin chose to evict Jessica.

Trivia

 * This was the first season to feature the Power of Veto as a permanent element in the game.
 * This was the first season where only six players were allowed to compete in Veto competitions.
 * This was the first season to feature the Fast Forward week, which would become a recurring event in later seasons.
 * This season is the only seasons to feature family members playing against each other (Courtney and Jessica)
 * This is the first season a female evictee received 10 votes.
 * The final six HOH's were all won by women.
 * This is the first season to have the winner beat the runner-up by only a single vote.
 * This is the first season to have an all women final four.
 * This is also the first season to have the final four consist of one gender.
 * This is the first and only season to not have any tie votes.
 * This is the only season where both members of the final two were nominated in Week 1.