Season 18

David and Kiersten's intervention hits a roadblock when David changes his mind about getting help; Taylor endures a painful trip to the dentist, who deals with several infected teeth; reviewing the progress of Toni, Allen and Angela.

Angela encounters a deadly relapse trigger; Taylor's mother has trouble keeping her emotions in check after her daughter's dangerous lifestyle escalates; Donna Chavous employs tough tactics in her double intervention of Kiersten and David.

Taylor's mother makes a disturbing discovery; Angela's frustration with her ex-husband challenges her ability to stay clean; Kiersten attempts to reconcile with her parents, but her heroin use stands in the way.

Police are called to the scene when a situation escalates; a young woman dances at a local strip club to finance her heroin habit; David and Kiersten's relationship comes to a dramatic head; Angela quits heroin cold turkey.

Michael Gonzales attempts to get Toni's mother, father and sister on the same page for Toni's intervention; young, heroin-addicted couple Kiersten and David live in a co-dependent relationship with David's mother, Linda.

Toni reveals details from her past relationship with Micah; interventionist Ken Seeley meets with Allen's sister to hear more about his past; Heather Hayes and Candy Finnigan switch gears in their triple intervention of Tiffany, Billy and Tracey.

A heroin addict's pimp sends her out on a bad call; the expanding reach of the Heroin Triangle puts first responders at risk; a police sergeant tries to get a homeless addict into a detox center; a former millionaire squats in an abandoned house.

Interventionist Heather Hayes enlists the help of colleague Donna Chavous to further investigate the opioid epidemic north of Atlanta; Zac's family history of violence and drug abuse threatens to undermine his intervention.

Documenting the nation's opiod crisis in the Heroin Triangle, a collection of affluent suburban communities north of Atlanta; volatile couple Tiffany and Billy use a sizable tax return to score a large of amount of heroin.