Authorities in Cancun, Mexico, say vacationer Elijah Snow's death was an accident, but in an exclusive interview, wife Jamie reveals the evidence she says suggests he was brutally killed.

Tonia Bales (podcast "The First Wife: John Meehan's Reign of Terror") is joined by his second wife, Debra Newell (book "Surviving Dirty John: My True Story of Love, Lies and Murder") and daughter Terra Newell, who fatally stabbed him in self-defense.

Fran says she's in love with a man she has never met and hopes to prove to everyone that not only is their love real, but he is real too; her siblings say he is only in the "relationship" for the money -- Fran has sent him over $30,000.

When Jenaye posted an emotional video online about uncovering husband James' infidelity, she never imagined it would go viral; he says he is willing to do anything to avoid losing his family; his former hairstylist creates more drama.

Jenaye meets the woman with whom her husband, James, cheated on their fifth wedding anniversary; Chelsey says she believes she has done nothing wrong -- and that she, too, is a victim.

In July 2021, 22-year-old Gabby Petito set off from Florida on a cross-country van trip with her fiancé, but two months later, he returned alone; her desperate father pleads for answers about the missing young woman.

Brian "The Bull" Barbosa, two-time Interim World Middleweight boxing champion, admits there is something seriously wrong with his brain; Dr. Phil reveals the results of a state-of-the-art brain scan he set up for Brian to take.

What 22-year-old "van life" blogger Gabby Petito's final videos reveal about what might have happened to her; police release body cam footage of distraught Gabby crying about an altercation with her fiancé in the days before she disappeared.

Josh wrote to Dr. Phil desperate for help to save his brother, Dustin’s, life. Josh says after years of battling addiction, there’s one thing that his little brother just cannot quit, and that’s his bulimia. His mom, Melissa, says she’s a registered nurse but cannot save her own son. Dustin says he’s tried everything to recover from his eating disorder, but nothing has worked.

Dr. Phil meets airline passengers who filmed what became viral videos of physical altercations, verbal abuse and "entitled" behavior; two people who were kicked off their flights blame their flight attendant's "abuse of power."

Megan and Brandy say their 69-year-old grandmother, Gail, is being catfished by a scammer posing as musical artist Post Malone, and they are worried for her safety and mental health; Gail wants to prove that the relationship is real.

Sabrina says she has a relentless, obsessed stalker who monitors her every move -- her boyfriend of six years, Harold; he says he has no choice but to stalk her because she's become "untrustworthy" ever since her "Brazilian butt lift" surgery.

Emily says her childhood was full of dysfunction because her mother, Linda, lived a double life as a suburban housewife and a drug-addicted "madam" who oversaw two brothels that serviced rich and powerful men.

Samantha says her mini gastric bypass surgery in Tijuana went terribly wrong, and when she wanted to leave the hospital, her husband, Josh, stood by and would not help her leave -- and now her fears are tearing apart her already fractured family.

Former guest Lydia, 80, aka "Glamma," meets three wealthy eligible bachelors, who each take her on a date; Annie, 82, is a social media influencer with more than 250,000 followers; Ernestine, an 85-year-old bodybuilder, trains clients half her age.

Kelli, 32, says she has been to multiple drug and alcohol detox and rehab centers but can't stay clean; her mother says it's because Kelli refuses to face her traumas, and they are keeping her stuck in her addictions.

Gabby Petito's parents are all interviewed together for the first time since the 22-year-old "Van Life" vlogger's body was discovered in Grand Teton National Park in Wyoming, as the manhunt for her fiancé, Brian Laundrie, continues.

Gabby Petito's parents tell where they believe Brian Laundrie may be hiding and what they hope happens to him if he was involved in Gabby's death; their reaction to the latest developments in their daughter's case.

Dr. Phil welcomes back previous guest Heather and her daughter, Marissa, who is rebelling in dangerous ways, and reads a chilling text exchange in which Marissa says she has attempted to kill her mother.

Susan says her daughter, Emma, has always had a troubled life of drugs and abuse and that things took a turn for the worse when Emma's fiancé died of an overdose, leaving her alone with her two children.

On an early June morning in 2007, 32-year-old Chris Vaughn was found limping away from his SUV with two non-fatal gunshot wounds. His children, 12-year-old Abigayle, 11-year-old Cassandra, and 8-year-old Blake, were found dead, seated together in the rear passenger seat, each shot twice. The body of Chris’ wife, Kimberly, was in the front passenger seat, slumped over the center console with a single contact gunshot wound under her chin. Chris’ handgun was found on the floorboard near her feet. Five years later, a jury convicted Chris of murdering his family, and he is now serving four life sentences. Chris’ parents, Gail and Pierre, sit down for their first television interview with Dr. Phil to tell him why they believe their son is innocent.

Dr. Phil continues his conversation with Chris Vaughn’s parents, Gail and Pierre, who say they believe their son is innocent of committing the murders of their three grandchildren and daughter-in-law. Chris recently spoke out about the horrific morning of June 14, 2007, for the first time, when he sent Gail and Pierre a letter giving his explanation on what happened. For the past 14 years, private investigator Bill Clutter has been investigating the case and claims, with the help of Chris’ letter, he now has the answers in hopes of getting Chris out of prison. Bill shows what he believes happened inside that SUV. If Chris didn’t commit these murders, then who did and how? Also, hear from Chris Regis, the former Assistant State’s attorney who fought hard to put Chris behind bars. He says Chris Vaughn is right where he should be.

Michelle says her 9-year-old son, Raymond, has screamed, cursed, and punched others since the age of 3 -- and even recently gave his grandmother a black eye! Michelle says she’s exhausted spending so much time trying to keep up with Raymond’s latest diagnoses and trying new medications that doctors prescribe for him. But Michelle’s family members say they want to know if Raymond’s issues are real or if he’s just choosing to act out? Certified Behavioral Analyst Megan St. Clair and Child and Family Psychiatrist Dr. Charles Sophy work with Raymond and his family and weigh in on the possibilities with Dr. Phil.

Carlea wrote into the show desperate for Dr. Phil’s help because she claims her brother, Jay, is an egotistical,untruthful narcissist who physically abused the mother of his child, Cassie. Carlea says her nephew, Ky, deserves better, and Jay needs to be Ky’s father 100 percent of the time; not after the next girl, the next party, or the next group of what she calls “idiots” he wants to associate with. Jay and Cassie both agree they do not know how to co-parent, and the only one they trust for advice is Dr. Phil.

On August 13, 2019, 37-year-old Andrea Knabel, an outgoing and devoted mother of two who volunteered for a group that helps find missing people, disappeared; it turns out that Andrea was hiding several secrets about her risky behavior.