ABC 20/20 “What Happened to the McStays?” October 3 2025
20/20 returns with an all-new two-hour episode titled What Happened to the McStays? airing Friday, October 3, 2025, from 9:00 to 11:00 p.m. EDT on ABC. The episode takes a deep dive into one of the most mysterious and heartbreaking missing person cases in recent U.S. history — the disappearance of the McStay family. Viewers can also stream the episode the next day on Disney+ and Hulu.
The Disappearance
In early 2010, Joseph and Summer McStay and their two young sons, Gianni (4) and Joseph Jr. (3), suddenly vanished from their Southern California home in San Diego County. What made the case especially bizarre was what investigators found — or didn’t find — at the scene. The family’s two dogs had been left behind outside without care. Inside, there was uneaten food on the counter and children’s clothes scattered around, giving the impression that the family left in a rush or was interrupted.
Shortly afterward, the McStay family’s vehicle was found abandoned near the U.S.–Mexico border, sparking theories that they had crossed into Mexico voluntarily. But there was no evidence to support that theory — and no sign of the family for years.
Breakthroughs and Heartbreak
The case captivated the nation, remaining unsolved for over three years until a shocking discovery changed everything. Senior National Correspondent Matt Gutman leads the investigation in this 20/20 special, tracing the timeline from the family’s last known activities to the stunning discovery of their remains in the Mojave Desert in 2013.
The program features new interviews, case evidence, and expert commentary, offering deeper insight into what went wrong and how the investigation unfolded over time. Viewers will learn how investigators ultimately connected the crime to someone close to the family and pieced together the chilling truth behind their disappearance.
A Closer Look at a National Mystery
Through emotional interviews with those closest to the case, What Happened to the McStays? highlights the devastating impact of the tragedy on extended family and the unanswered questions that linger even after a conviction. It also examines the intense public interest, false leads, and the long road to justice.
This episode promises to be a compelling start to 20/20’s October lineup, with a mix of true crime reporting and human emotion that has become the hallmark of the long-running newsmagazine. Don’t miss it on ABC, Friday, October 3.
