Survivor (U.S.)

Survivor is a U.S. reality-based competition television show.

The United States version is produced by CBS, it is currently aired at 8pm during Wednesdays (formerly Thursdays).

Format Variations
While the United States version introduced the standard Survivor format in, subsequent seasons introduced several game-changing twists to keep the contest exciting and fresh.

Number of members per tribe
For the first seven seasons, there were two tribes of eight members (picked by production, picked by the oldest contestants, and gender). In Survivor: All-Stars, eighteen contestants returned to play with three tribes of six. Survivor: Vanuatu featured two tribes of nine divided by gender.

"Versus" Seasons
In, featured a tribe of ten fans competing a tribe of ten of past popular favorites. would also featured this concept. featured two returning contestants from the previous season, on separate tribes. featured ten notorious contestants known for their deception competing against ten heroic contestants known for their honesty and trustworthiness. and featured two contestants each competing on separate tribes, Russell Hantz and Rob Mariano, and Coach Wade and Ozzy Lusth. featured three past contestants who were removed for medical reasons were placed on their separate tribes to compete with new contestants.

Tribe Switch and Dissolves
Main Article: Tribe Switch and Tribe Dissolve.

A tribe dissolve is when there are more than two tribes in the season and the remaining contestants are placed in only two tribes. Either the contestants in the other tribe(s) are placed in the two tribes (seen in, and ) or all contestants are shuffled in the two tribes (seen in ,, and ). A tribe switch is simply a game twist that shuffles the tribe affiliations.

One World
Main article: One World (twist) 

Losers Bracket Formats
Named as such by Jeff Probst, the Losers Bracket provides an opportunity for an eliminated contestant (excluding quitters and medevaced players) to re-enter the game.

Couples Format
Main article: