Season 6

They're cheap, easy to get and legal. They're also deadly. But that's not stopping teenagers and young adults from using chemical inhalants to get high. Hundreds of everyday products–household cleaners, disinfectants, computer dusters–contain chemicals that when breathed in give a powerful five-second high. It's called huffing and studies show that over two million kids nationwide are doing it. We'll take a powerful look at the trend and how it is shocking parents and destroying young lives.

Profiling "sober companions" who help former addicts, who are in rehab and living on their own, to help prevent a relapse.

Gabe and Allison return to tell their stories after they both faced interventions and treatment. Gabe used heroin to deal with the deep emotional scars caused by his adoption. Will Gabe ever be able to accept his family's love and support? Meanwhile, Allison, who was addicted to inhalants, visits home for the first time to try to make amends to the people she hurt.

This special looks at the gut-wrenching but hopeful stories of three Iraq veterans and their struggles with addiction caused by combat stress. Leia's flashbacks to the terrifying things she saw in Iraq caused her to drink until she connected with a support group of fellow veterans. Paul saw some of the heaviest fighting of the war and turned to alcohol and cocaine when he returned home, but a detox program is helping him to cope and move on. And after Matt was discharged, he had vivid nightmares about being shot or burning, and he started drinking to calm himself down.

To outsiders, Marci's family life seemed ideal. But while her mother worked, Marci was left home with her alcoholic father. She endured his abuse while her mother looked the other way. Marci began drinking and doing drugs. Her marriage failed, and she lost custody of her children. But her mother still denies that Marci has a bad problem.

At 53, Gloria prides herself on being a good cook and an independent, fun-loving woman. But Gloria uses her cooking and charm to manipulate her family into letting her drink as much as she wants. Gloria had difficulty raising her children, and was married to an abusive man. At 42, Gloria got breast cancer and underwent chemotherapy and radiation but did not stop drinking.

Sebastian, 21, and his brother Marcel, 20, were soccer celebrities in their town at a very young age. Cool and rebellious, Sebastian hung out with older teammates and started doing marijuana, cocaine and meth. Then Marcel got strung out on cocaine, Xanax and OxyContin, and also sold drugs.

With a terrifying addiction to heroin, Joey's career as a tattoo artist is in jeopardy. His parents divorced when he was three. At 13, Joey started smoking marijuana and soon graduated to ecstasy, LSD, and heroin. When he stole his mother's credit cards, she reluctantly filed charges and he went to jail. He has a daughter now, but the girl's mother is afraid to let Joey be alone with her.

This follow-up episode features former subjects Chad and Brooke as they rediscover their lives during and after treatment. Chad's crack addiction destroyed his career as a world-class cyclist. Seven months after his intervention, he's been given a chance to redeem himself.

Although she has two loving children and an adoring husband, Danielle is dangerously addicted to Percocet. As a teen, Danielle felt neglected by her alcoholic father and began cutting herself. Now she spends each day hiding behind closed curtains, ignoring her children, and self-medicating with up to 40 Percocet a day.

Aaron was a mixed martial arts champion, but at the height of his career he started working in porn under the name "Dick Delaware." Through the porn scene, Aaron was introduced to crystal meth. His daily habit took over and he lost both his porn and fighting careers. He now spends his days using drugs and watching porn for hours on end, and his wife is at the end of her rope.

Now 43, Bret once had a promising career in real estate. But the stress to make more money to provide for his family took its toll, and Bret became an alcoholic. Two years ago, Bret's family held an intervention and sent him to rehab programs, but he relapsed. His wife finally divorced him, he lost his job, and he continues to be totally focused on drinking.

When she was young, Nikki's mother and grandmother worked hard to give her a good life. Nikki excelled in school, but she was devastated when her grandmother died. She began hanging out with a rebellious crowd, skipping school, and using crack. Nikki eventually had two daughters, but has remained addicted to drugs. Her daughters desperately want to have a relationship with Nikki, and know that an intervention is their only hope of saving their mother's life.

Jason grew up in a seemingly perfect upper-middle class family in Littleton, Col., but he struggled to gain his father's approval. When Jason failed to make the baseball team his freshman year, Jason and his father were devastated. Jason began rollerblading and excelled, but he quit because his father disapproved of the sport.

Donald is a 38-year-old crack addict from Long Island, New York. When he was five, Donald's parents divorced after his Catholic father refused to accept his mother's conversion to Jehovah's Witnesses. Donald longed for a strong father figure, but his father had little contact with him.

Identical twins Sonia and Julia, 22, have shared everything in life. From their friends, to their love of film and karate - the girls have been true living mirrors of one another. Their proud parents immigrated to the United States from Poland with dreams to build a better life for their future children, and their dreams came true

Forty-year-old Jeff was once known as a heroic firefighter after he saved his partner's life. But Jeff was traumatized by the harrowing event, and his drinking increased drastically. Jeff has received two DUI's and been rushed to the hospital numerous times for seizures. Jeff's alcoholism has also forced his son and wife to move out.

When he was three, Gabe's mother abandoned him on the streets of Calcutta, but he was adopted by a young American couple. Gabe seemed happy in America, but he secretly felt like an outsider. In high school he started to rebel and resent his Christian upbringing. He began using marijuana and cocaine, and later graduated to heroin.