
This episode covers four unsolved mysteries: the disappearance of Gus Hoffman in San Jose, California, the death of Patsy Wright from strychnine poisoning, the lost flight of French pilots Nungesser and Colley, and the sinking of the oil tanker Muskogee by a German U-boat.
The case of Gus Hoffman, a 19-year-old musician, began when he was last seen riding his restored motorcycle in 1978. His mother, Rose Hoffman, spent a decade searching for him, investigating motorcycle gang hangouts and gathering information about his potential abduction by gang members Michael Hodges and Michael Stevenson. Despite police arrests in connection with the case, no trace of Gus has ever been found.
Patsy Wright's sudden death in 1987 was attributed to strychnine poisoning found in her cold medicine. Investigators suspected foul play, as her burglar alarm was not set, and only those close to her would know her habits. Family members, including her sister and former boyfriend, were questioned but maintained their innocence.
The episode also recounts the story of Charles Nungesser and Francois Colley, who attempted to fly across the Atlantic in 1927, but their plane, the White Bird, disappeared without a trace. Archaeologists have been searching for evidence of the plane's crash for decades.
Lastly, the sinking of the Muskogee by a German U-boat in 1942 is detailed through the eyes of Captain William Betts' son, George, who uncovered the truth about his father's fate and connected with the German U-boat commander responsible for the attack.
Four unsolved mysteries include Gus Hoffman's disappearance, Patsy Wright's poisoning, lost French pilots, and the Muskogee sinking by a U-boat.

This episode stands out for the following:
I want my son, that’s the most important thing.Unsolved Mysteries with Robert Stack - Season 1, Episode 23 - Full Episode
I know we’ll find him.Unsolved Mysteries with Robert Stack - Season 1, Episode 23 - Full Episode
I believe that airplane is down there somewhere.Unsolved Mysteries with Robert Stack - Season 1, Episode 23 - Full Episode
I don’t ever want to go through that again.Unsolved Mysteries with Robert Stack - Season 1, Episode 23 - Full Episode
It’s frightening because we do know that somebody knew her very well.Unsolved Mysteries with Robert Stack - Season 1, Episode 23 - Full Episode
It’s just a little more peace.Unsolved Mysteries with Robert Stack - Season 1, Episode 23 - Full Episode