As of July 2026, Unsolved Mysteries Season 3 aired in 1990 with 56 episodes — streaming now on Amazon Prime Video. Full episode guide and where to watch below.

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Unsolved Mysteries Season 3

1990 56 Episodes Mystery · Drama ⭐ 8/10

Unsolved Mysteries Season 3 is currently streaming on and , and its case-by-case structure never gets in the way of the bigger story. The 1-season run is exactly the right length for what it is doing. 149 viewers have already rated it on TMDB — the kind of consensus that does not happen by accident. Robert Stack anchors it, but the writing does the real work. Put it on tonight and see for yourself.

Part of the current wave of titles people are actually watching, Unsolved Mysteries Season 3 earns its spot. Unsolved Mysteries Season 3 treats its mystery as a means, not an end in itself. Season 3 of Unsolved Mysteries includes 56 episodes. It aired from September 1990 to September 1991. This season stars Robert Stack. Robert Stack leads a cast that brings real weight to the material. It was aired in 1990. Unsolved Mysteries Season 3 is at its best in the quiet scenes between the plot beats, where the character work actually happens. It rarely drops the ball, and when it does, it recovers fast.

For anyone who wants their crime drama to earn its twists, Unsolved Mysteries Season 3 delivers. It rewards viewers regardless of what else is in their watch history. It is a manageable watch, easy to fit into a single week. Robert Stack anchors it, but the writing does the real work. If you are going to commit to one crime drama this month, make it this one.

📡 Where to Watch Unsolved Mysteries Season 3

🇦🇺 Australia

Amazon Prime Video

Amazon Prime Video with Ads

🇺🇸 United States

Amazon Prime Video

Peacock Premium

Amazon Prime Video with Ads

Peacock Premium Plus

🇬🇧 United Kingdom

Amazon Prime Video

Amazon Prime Video with Ads

🇨🇦 Canada

Amazon Prime Video

Amazon Prime Video with Ads

🇳🇿 New Zealand

Amazon Prime Video

🎬 Unsolved Mysteries Season 3 — Episode Guide

The series' third season opens with a report on sightings of a bright orange fireball that crashed in Pennsylvania and was reportedly removed under military supervision; a woman's first meeting with her biological father; an arsonist's home movies.

Segments: a murder attempt on a former Florida mayor; an Arkansas family's search for a long-lost brother; a five-plane Navy patrol's 1945 disappearance over the Bermuda Triangle; an antidrug activist's shooting.

Reports on the search for a Bakersfield, Cal., physician; the FBI hunt for a robbery gang suspected in armored-car holdups in Minnesota and Baltimore; and the disappearance of a Spokane electrician

Segments on the 1976 murder of a New Yorker who may have known too much about an organized-crime ring; a case involving the infilitration of Government computers and private phone lines.

Reports on the search for Nazi treasures buried near the Austrian-Swiss border; the disappearance of a movie producer's adult son in Beverly Hills; the search for an escaped convict; the disappearance of a boat and crew headed for Haiti.

Reports on a series of child-molestation cases; a Tennessee family's search for a missing sibling; a series of bizarre murders in a small town in New Hampshire.

Segments include the story of a South Carolina couple whose home withstood the destruction of 1989's Hurricane Hugo after their reported encounter with a ghost; the disappearance of a La Jolla, Cal., financial analyst in the El Paso desert.

New evidence in the 1937 disappearance of Amelia Earhart; the search for the murderer of a Woodstock, Ill., family; a climatologist who accurately predicted seven earthquakes in the past decade.

Repeat segments from the past three seasons include reports on Nazi war criminal Rudolf Hess; the murder of race-car driver Mickey Thompson and his wife Trudy; and supposed findings of intelligent life on Mars. Unexplained Death: Mickey Thompson (UPDATE)

The FBI probe into the 1965 murder of a black lawman in Louisiana; an update on a series of 1988 arsons; a policeman's nine-year search for his two sons; the hunt for a ""cowboy"" bank robber in Arizona and Washington.

Segments: the fatal shooting of a Massachusetts youth; the disappearance of a 4-year-old on a picnic in Montana; the murder of a truck driver at an Oklahoma rest stop; a reunion of two childhood friends.

The possible wrongful conviction of a Missouri man with the murder of a 79-year-old woman, which later resulted in a confession from a Kansas inmate.

Reports on the search for an assailant in the shooting of a North Carolina secretary; the murder of a pizza deliveryman and the subsequent finding three years later of the gun in a pawnshop; the unclaimed fortune of a deceased British socialite.

The search for a ""casanova killer"" who wooed then murdered women; a Florida man's search for his brother, who reportedly died in Vietnam but who may still be alive.

Unanswered questions involving the death of a 28-year-old nurse found in a North Carolina pond; a woman's search for her father, reportedly involved with the CIA.

Reports: a five-plane Navy patrol's 1945 disappearance over the Bermuda Triangle; a murder attempt on a former Florida mayor; the search for suspects in the shooting of an anti-drug activist. (Repeat)

A new segment probes the reopening of a murder case following anonymous phone calls to Florida police insisting the victim is still alive. Also: repeat reports on the experiences of three sets of identical twins; a policeman's hunt for his partner's killer.

Reports on the 1989 death of a Spokane teen; the FBI probe into the murders of a Bethesda, Md., Government worker's wife, three sons and mother; the apprehension in Albuquerque of two Federal fugitives.

Reports on the search for a man whose wife and two stepdaughters were murdered in Las Vegas in October; the FBI search for a bank robber who twice escaped from prison.

A report on the FBI hunt for a coldhearted con man wanted for bilking women. Also: a repeat segment on sightings of a bright orange fireball that crashed near Kecksburg, Pa., in 1965.

🎭 Cast of Unsolved Mysteries Season 3

Robert Stack

📋 All Seasons of Unsolved Mysteries

Season 1 Season 2 Season 4 Season 5 Season 6 Season 7 Season 8 Season 9

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