Colter is forced to team up with his estranged brother, Russell, who enlists his help to track down a former army buddy who's gone missing after several weeks of paranoid behavior. The investigation takes the brothers into the world of Special Forces missions, shady off-the-books programs and conspiracy theories, all while they contend with their family's past.

Colter is tasked with tracking down a "ghost" when hired to find a man who seemingly died in a car accident months earlier. Meanwhile, Colter catches a break in his white whale case.

Colter returns to Echo Ridge to investigate a diner owner's disappearance, only to uncover a decades-old kidnapping and a shocking family secret.

While searching for missing campers, Colter meets a retired police officer who believes a serial killer is on the loose.

After Colter is hired to find a missing singer linked to a violent crime, he discovers his target is a stoic survivalist, not unlike himself.

Colter travels to New York City to find a woman who vanished in the dressing room of an upscale clothing store.

When a widower offers a reward to find his only daughter who disappeared three years ago and is presumed dead, Colter agrees to help track her down.

When Colter finds a lost dog at a gas station in Denver and the dog is subsequently stolen from his truck, Colter makes it his mission to track him down and reunite him with his family.

A new lead in Colter's white whale case, the disappearance of Gina Picket, brings him and retired cop Keaton back together to track down a serial killer.

Colter investigates the disappearance of two amateur storm chasers, one of whom is the daughter of an old family friend, that the local police have written off as an accidental drowning. Colter's expert tracking skills lead him to uncover the seedy underbelly of a small town resort.

Reenie urgently calls Colter for help when Leonard Sharf's assistant gets kidnapped ahead of the launch of his new business. Also, Colter visits his sister, Dory.

Colter journeys into the wilderness of Idaho to help track down the owner of an aerial outfitting company's missing adult children who were last seen in a plane that took off during bad weather with a mysterious client on board.

When a grad student goes missing after a house party, his friends and family believe he buckled under the pressure of his research grant. But, after consulting with his sister Dr. Dory Shaw, a professor at the school, Colter uncovers a trail of explicit photos and messages that lead him to uncover a dangerous – and deadly – conspiracy on campus.

When Colter disappears during his search for a missing father, Reenie recruits his brother Russell for help.

Colter and rival rewardist Billie Matalon team up to find a missing high school baseball star.

Colter heads to Willow Creek, Mich., after a worried mother hires him to track down her beauty queen daughter, Riley, who vanished while driving home from work. While investigating at the garden center where Riley works, Colter looks into her modeling past and uncovers that she was hiding a major secret.

The odds are stacked against Colter as he is tasked by a convicted murderer's teenage daughter to track down a missing witness who could prove her dad's innocence.

Colter tracks down a dockworker who went missing two weeks before his wedding following a confrontation with his past.

The disappearance of a family in the backwoods of Arkansas leads Colter to a shocking discovery.

While tracking the son of a prominent New Jersey cupcake chain founder, Colter gets thrust into the middle of a violent mafia war.

Colter recruits fellow rewardist Billie Matalon to infiltrate a women's prison in order to gain access to critical information that would help track down an escaped prisoner and her hostage.

As Colter helps a young woman locate her free-spirited sister, he digs deeper into how the sister's last days may lead to a dark secret she unearthed in this tight-knit town.

Colter races against the clock to find the missing teenage son of Reenie's close friend Erika.

Colter, Bobby and Reenie race against time to track down a talented MMA fighter who disappeared while trying to solve her family’s trouble with their visas.

Colter takes a job locating a missing teen with a unique spiritual gift in an inhospitable mining town.