ABC 20/20 “Stranger in the House” March 27 2026

ABC’s 20/20 returns Friday, March 27, 2026, with the gripping two-hour episode Stranger in the House, airing at 9:00 p.m. EDT and streaming the next day on Disney+ and Hulu. This rebroadcast revisits the shocking 2010 killing of Heidi Firkus, a case that remained unsolved for years before a stunning discovery brought it back to life.

On what should have been a quiet Sunday morning, Nick and Heidi Firkus called 911, reporting that an intruder was breaking into their home. When police arrived, they found Heidi dead from a gunshot wound and Nick injured. At the time, Nick claimed a masked attacker was responsible, and with little evidence to contradict his story, the case eventually went cold.

As investigators later uncovered, the couple had been facing serious financial trouble and were on the brink of eviction the very next day. Despite these details, years passed without answers. Nick rebuilt his life, remarried, and started a new family, while Heidi’s case faded into the background.

Everything changed when Nick’s second wife, Rachel, discovered a hidden item in his home that raised alarming questions. Her discovery prompted authorities to take another look at the case, ultimately leading to a dramatic breakthrough. The episode explores how that key piece of evidence shifted the investigation and brought renewed focus to what really happened inside the Firkus home.

Stranger in the House features interviews, investigative details, and a step-by-step look at how a long-dormant case was revived. It is a story of secrets, deception, and the truth emerging years after a crime that once seemed impossible to solve.