Sheriff Jamey Noel sends seven volunteer civilians into jail to serve as undercover inmates.

Six months after the completion of an unprecedented program in Clark County Jail, all seven participants have returned to their lives unalterably changed.

As three new participants enter the program, the others for acceptance in the pods. One participant is forced into a confrontation that quickly turns physical.

All hell breaks loose in the Clark County Jail when two pod bosses threaten the safety of three of our participants.

Sheri, Ryan and Quintin find themselves going deeper undercover as Dion and Ashleigh grapple with their respective pasts. Monalisa has a major revelation about her daughter's situation.

Raw sewage flows into inmate pods causing chaos throughout Clark County Jail.

With the sewer line repaired, the participants return to their pods only to encounter new challenges and dangerous threats.

Tension is running high in the pods as the six remaining participants enter their final days in the Clark County Jail.

In the final days of their stay in the Clark County Jail, the three remaining participants gather their last bits of evidence and narrowly avoid conflict before their names are called for bed and baggage.

With Sheriff Noel's program having come to a close, all eight participants are brought together with Sheriff Noel and Captain Maples to talk about their journey as inmates and what they discovered while in Clark County Jail.

A look back at Clark County's memorable moments from Season 1 & 2.

Seven months after the completion of Phase Two of Sheriff Noel's unprecedented program at the Clark County Jail, the eight participants return home with different perspectives as many of them consider new life goals. We follow them home to see how their time in the program affected their lives. The Phase Two participants have all become close friends since the reunion, so they decide to throw Dion and his fiancee Ashlee an engagement party to celebrate their special bond.

In Atlanta's Fulton County Jail, Colonel Mark Adger is sending 17 undercover volunteers into his facility to find solutions to contraband, drug smuggling, and gang violence. The participants who infiltrate Atlanta's Fulton County Jail for this season include a special education teacher who works with at-risk youth, a man who believes that the system has failed African Americans and wants to help fight discrimination, a former corrections officer who wants to see what it is like when the roles are reversed, a woman who met her husband while he was incarcerated and hopes to understand his institutionalized behavior, a Marine with law enforcement aspirations, and others.

The first five participants enter Fulton County Jail and are immediately met with drug use, sexual behavior, and what it feels like to be locked in a cell for 12 hours.

As participants settle into Fulton County Jail and new ones enter, inmate suspicions and power-plays keep everyone on edge.

A violent fight in the women's pod and an abuse of power in pod 600 cause extended lockdowns, proving that the luck of the draw with cell mates can make or break the experience in jail.

Sheri, Ryan and Quintin find themselves going deeper undercover as Dion and Ashleigh grapple with their respective pasts. Monalisa has a major revelation about her daughters situation.

A flood in the South Annex, escalating problems with cellmates, and respect issues push our participants to the brink of despair in the Fulton County Jail.

The male participants in 500 suspect each other of being in the program, while the women struggle to continue, and one may even drop out.

The participants at the Fulton County Jail find that small mistakes can have big consequences, as the Bloods in 500 continue to rise in power.

A chaotic mass evacuation drill in 500 turns dangerous when inmates slip their restraints, and a rumor about the program in the women's pod puts Mauri and Michelle in a vunerable position.

An uproar in Zone 500 results when an inmate claims to be a Marine, Jon is taken advantage of by a new inmate with the same name, and Michelle gets caught in the middle of a drug deal gone wrong.

In the Fulton County Jail, participants Matt and Michelle are faced with tough choices regarding drug use that put their safety, and time in the program, at risk.

The participants endure their final days at the Fulton County Jail, but one has to make the tough decision to stay another 60 days.

The eight participants discuss their experiences at the Fulton County Jail.