Tracker Season 3 Episode 6, Angel, aired on November 23, 2025, on CBS.
The show stars Justin Hartley as Colter Shaw. Colter uses survival skills and detective work to solve cases. This week’s story is about a missing crime scene cleaner. Colter looks through online forums, amateur detectives, and old secrets. He discovers not just a disappearance, but a serial killer. The killer calls themselves an “angel of mercy.”
In Tracker Season 3 Episode 6, Colter’s case begins when Margot disappears. Margot works for BioZone Cleaning, a crime-scene cleaning company. Her boss, Ruth, is very worried and offers a $10,000 reward to find her. She thinks Margot’s disappearance is linked to Margot’s secret love of true crime.
Colter gets help from his tech partner, Randy, and others. They learn about Margot’s hidden life. She was part of an online group of amateur crime investigators. She talked online with two men: Gunther, a crime-scene photographer, and Eddie, a collector of crime-scene items.
As Colter follows Margot’s last steps, he and his team find scary connections. A series of deaths that seemed like accidents is linked. They all share the same symbol: angel wings. The symbol points to a dangerous man. He calls himself an “angel of mercy.” He believes that by killing sick patients and their caregivers, he is helping them.
Now we get to the main mystery of Tracker Season 3 Episode 6. Who is the “angel of mercy”? Why does he kill?
Who is the angel of mercy in Tracker Season 3 Episode 6?

In Tracker Season 3 Episode 6, the “angel of mercy” is Francis, also called Francis Gable. He works at Vorhees Physical Therapy Center.
Colter investigates secretly and finds a pattern in deaths that seemed unrelated. Colter realizes Francis is a serial killer and has been killing for decades.
Francis is not an ordinary killer. He hides his crimes with symbols and a twisted sense of right and wrong. Angel wings appear at crime scenes and secret rooms.
Colter and his team find these wings in the house of the Hardens. The Hardens were an elderly couple whose deaths Margot thought were not accidents. And she was right.
Colter digs deeper and finds more victims. These victims were mostly caregiver-and-patient pairs. They all had connections to Vorhees Physical Therapy Center.
Randy, Colter’s tech expert, helps check records. He finds that many deaths were called “accidental” or “natural.” This happened over 25 years.
Why did Francis become the “angel of mercy” in Tracker Season 3 Episode 6?

Understanding why Francis kills in Tracker Season 3 Episode 6 shows how scary his crimes are. His reason is personal and comes from trauma.
Childhood trauma:
Francis grew up in a family focused on caregiving in Tracker Season 3 Episode 6. His mother spent most of her time caring for his disabled brother. Francis learned a cruel idea: his brother was “alive, but not really living.” He thought relationships between patients and caregivers were broken and unfair.
Over time, he believed only he could free these pairs from suffering. He thought killing them was an act of mercy. He believed he was giving them release.
Symbolism and control:
The angel wings are more than a sign. They show how Francis sees himself. He thinks he is like an angel: watching, judging, and giving a “merciful” gift.
He does more than kill. He sets up scenes carefully. In the Hardens’ house, Colter finds a secret room with food containers. Someone had been hiding and working there in secret.
The angel wings appear in many crime scenes. This shows Francis is not acting on impulse. He has a long-term, cold, and planned pattern.
Maintaining secrecy
Francis avoids getting caught for decades in Tracker Season 3 Episode 6. He targets vulnerable people: patients and their caregivers. He uses his job at Vorhees Physical Therapy Center to get close to them.
Many of his murders are not reported or are misclassified. People think the deaths are natural, caused by medical problems, or neglect.
Francis hides his double life with symbols. The angel wings are subtle and hard to notice. They are his signature and his excuse for killing.
Target those who question
In Tracker Season 3 Episode 6, Margot becomes a threat to Francis. She is investigating and connecting the dots. She sees the angel wings and realizes the victims are linked.
Her curiosity makes her dangerous to him. She could expose his decades-long secret.
Francis kidnaps her to stop her. He also wants to show her he has been watching all along. When confronted, Francis does not run. He tries to justify his crimes. He tells Margot and Colter that he was doing “mercy” killings.
In Tracker Season 3 Episode 6, the “angel of mercy” is Francis, who is a deeply damaged man. For decades, he has killed patients and caregivers. He believes he is giving them peace.
What makes him scary is his self-justification. He thinks his killings are acts of mercy and uses his job as a helper to cover his crimes.
Tracker Season 3 Episode 6 ends with Colter stopping Francis. This brings some justice, but it also raises questions: Can killers like Francis ever be fully understood or stopped? How should caregivers and institutions protect the vulnerable? And how far can amateur investigators go before they become targets?
Also Read: Tracker Season 3 Episode 6 recap: A missing crime scene cleaner leads Colter to a deadly killer