Rhiannon, an outlaw who regularly robs gold from the stagecoach, shoots the new sheriff and then carries him to the doctor. The doctor cleans up Rhiannon and presents him to the sheriff as the man who saved his life. Rhiannon is deputized by the sheriff, and becomes torn between his new life and the prospect of robbing the next gold shipment…
Of the forty-nine episodes of Out of the Unknown that were made, only twenty survive in their entirety, mainly from series one. Almost thirty minutes of “The Little Black Bag” also survive, as do shorter clips from “The Fox and the Forest”, “Andover and the Android”, “Satisfaction Guaranteed”, “Liar!” and “The Last Witness”. Complete audio recordings exist of “The Yellow Pill” and “The Uninvited” as well as audio clips of other lost episodes. Off-screen photographs, known as tele-snaps, were taken of many first and second series stories including some of the missing episodes. These were published in Mark Ward's Out of the Unknown: A guide to the legendary BBC series in 2004. The fourth series episodes “The Last Witness” and “The Uninvited”, both of which are missing, were remade as episodes of Hammer House of Mystery and Suspense - respectively as “A Distant Scream” and “In Possession” - and broadcast in the UK in 1986.