Various specials shown before a season of Big Brother starts.

Season 1

6.8

.

2000

.

70 Episodes

Big Brother 2000 was a near-exact port of the hit Netherlands (Holland) series of the same name. Every week, Housemates would nominate two fellow housemates and the two or more housemates with the most nominations were eligible for banishment. American viewers could then call a 1-900 number and cast a vote to banish a HouseGuest.

Season 2

8

.

2001

.

30 Episodes

This season brings a complete reformatting of Big Brother 1. The introduction of the Head of Household (HOH). The HOH nominates two houseguests for eviction. The fellow contestants vote, and the player with the most votes is evicted. On finale night, all former houseguests returned to vote for who they think should win the grand prize.

This season brings about more changes to the Big Brother format - the introduction of the Silver and Golden Power of Vetos.

In this season's twist, ten of the thirteen houseguests are shocked to learn that they will compete alongside their exes. In addition, introduction of the Diamond Power of Veto and the sequestered Jury.

In this season's twists, there are two sets of pre-existing relationships in the house - secret twins and long lost siblings.

In this season's twist, every houseguest enters the house with a secret partner - believing they were the only pair. If both can reach the end, the winner would receive a grand prize of $1,000,000 and the runner-up, $250,000.

Fourteen of the best and most iconic Big Brother Houseguests make their return to compete for the $500,000 grand prize.

Season 8

8

.

2007

.

33 Episodes

In the season's twists, 3 houseguests are shocked to learn their "enemy" will be entering the game - ex best friends, ex-boyfriends, and an estranged father and daughter.

In the season's twist, every houseguest would compete, be nominated, and be evicted as couples.

Season 10

7.9

.

2008

.

29 Episodes

Season 10 of Big Brother premiered on 2008-07-12.

Season 11 of Big Brother premiered on 2009-07-09.

Season 12

8.6

.

2010

.

30 Episodes

Season 12 of Big Brother premiered on 2010-07-07.

In the twist of the summer, three Dynamic Duos of iconic previous houseguests make their return for another chance to win - Dick and Daniele, Jordan and Jeff, Rachel and Brendon.

Season 14

8

.

2012

.

30 Episodes

In the season's twist, four previous houseguests return as Coaches to build a Big Brother dream team - a $100,000 prize awaits the coach who picks the Big Brother winner.

Season 15 of Big Brother premiered on 2013-06-25.

Season 16

8

.

2014

.

40 Episodes

This season's twist brings about the Battle of Block - two HOHs, 4 nominations, and the chance of an HOH being evicted.

Season 17

8

.

2015

.

40 Episodes

This season brings back the iconic Twin Twist with two sisters swapping out every few days, unbeknownist to the other houseguests. The Battle of the Block makes it return.

Season 18 of Big Brother premiered on 2016-06-22.

Season 19

7.3

.

2017

.

39 Episodes

Season 19's new twist is called “Summer of Temptation,” where the Houseguests will be challenged like never before as they embark on a season of tempting offers that could give them money, power and safety in the game. But, they will need to be careful, because for every temptation taken, there will be a consequence to face. This season's house reflects the temptation twist with words like Money and Revenge hanging on the wall, constantly reminding the Houseguests that the game never stops.

Season 20

8

.

2018

.

40 Episodes

Season 20 of Big Brother premiered on 2018-06-27.

Season 21

7.1

.

2019

.

40 Episodes

Season 21 of Big Brother premiered on 2019-06-25.

All Stars 2

6.9

.

2020

.

37 Episodes

Sixteen former Houseguests return to the game for a second chance at the grand prize of $500,000.

Season 23

1

.

2021

.

37 Episodes

Season 23 of Big Brother premiered on 2021-07-07.

Season 24

2.7

.

2022

.

34 Episodes

Season 24 of Big Brother premiered on 2022-07-06.

Season 25

4.2

.

2023

.

42 Episodes

It is the Summer of the BB Multiverse. Three former Houseguests enter the house and unleash four universes onto the house. The Comic, Humili, Scary, and Scramble-verses unlock new twists and themed competition.

Season 26

2.7

.

2024

.

39 Episodes

This season is the Summer of Artificial Intelligence. A.I. bots Ainsley and Jankie take over and introduce a brand new competion that changes the game - the A.I. Arena.

Season 27

2.5

.

2025

.

39 Episodes

This season is the Summer of Mystery as the Houseguests enter the Hotel Mystère, a place where secrets lurk behind every door and nothing is as it seems. This season celebrates the 25-year anniversary of the series as a whole.