
This episode covers the mysterious case of Navy medic Mark Dennis, UFO sightings in Canada, and the crimes of Ricardo Caputo. It features interviews with family members and law enforcement officials.
In 1966, Navy medic Mark Dennis was presumed dead after a helicopter crash in Vietnam. His family later believed he might have survived after seeing a photograph of an unidentified POW in Newsweek. Despite the Navy's insistence that he was killed in action, evidence emerged suggesting he may have been alive after the crash.
In Vancouver, British Columbia, Dorothy Eyes captured unusual lights on film, which she believes are UFOs. Despite skepticism from experts, her photographs gained attention and she continues to document her sightings.
Ricardo Caputo, a charming man, is suspected of murdering multiple women, including his girlfriend Natalie Brown. After being declared incompetent to stand trial, he escaped from a psychiatric hospital and continued his violent spree.
The episode also updates viewers on the capture of Kenneth Robert Stanton, a serial child molester, following a broadcast appeal for information.
Mark Dennis's mysterious fate, UFO sightings, and Ricardo Caputo's murders are explored in this episode.

This episode stands out for the following:
Mark Dennis was a deeply religious young man.Unsolved Mysteries with Robert Stack - Season 3, Episode 13 - Full Episode
I don’t think Mark died that day.Unsolved Mysteries with Robert Stack - Season 3, Episode 13 - Full Episode
Mark Dennis has a right to not be listed dead.Unsolved Mysteries with Robert Stack - Season 3, Episode 13 - Full Episode
Ricardo Caputo was charming, but appearances were deceiving.Unsolved Mysteries with Robert Stack - Season 3, Episode 13 - Full Episode
He’s a good con artist, a smooth talker.Unsolved Mysteries with Robert Stack - Season 3, Episode 13 - Full Episode
I feel there is some sort of message.Unsolved Mysteries with Robert Stack - Season 3, Episode 13 - Full Episode