You wouldn't think so--but it can get kinda lonely around here sometimes! That's why I'm building my friend! Not only holds an interesting conversation--but he glows in the dark! His name? well, I thought I'd call him something sinister--Dracula, maybe! My name's Cain-- I'm the caretaker around here...and you've just entered the HOUSE OF MYSTERY! 
- — Cain
House of Mystery #201 is an issue of the series House of Mystery (Volume 1) with a cover date of April, 1972. It was published on February 15, 1972.
Synopsis for "Put Your Trust in a Killer!"
Cain gets involved personally in this story to show a gangster just what would have happened if his fingerprints had not been found at the crime scene. The man is sitting on Death Row taking the rap for a murder that his boss committed because he believes the man's lies that he will get him released. Cain magically alters the world so that the man's fingerprints were not found at the crime scene and he disappears from his cell. When he finds himself back at the gangster's hideout and the boss takes him out into the woods to rub out a witness to his murder, the convict realizes he is being made a patsy and finds himself back in his cell. He calls out to the guards in order to make a complete confession.
Appearing in "Put Your Trust in a Killer!"
Narrator:
Featured Characters:
- George Ringler (Single appearance)
Supporting Characters:
- Julie Ringler (Single appearance)
Antagonists:
- Big Joe (Single appearance)
Other Characters:
- Paul (Single appearance)
- John (Single appearance)
- Carson (Appears only as a corpse)
Locations:
- An undisclosed city
- A prison
- A prison
Synopsis for "Million-Dollar Magic"
This story is reprinted from House of Mystery #60.
Caspar Creed is 65 years old, and he has spent a fortune searching for a magical object that will bring back his youth. After buying several objects that turn out to be phonies, Creed heads to Egypt to use a magical pearl scarab that apparently grants wishes. However, the scarab turns out to be a phony, just like all of the others. Bitterly disappointed, Creed is about to leave, but a man offers him an old falcon that is about to be killed. Creed feels sympathy for the falcon, so he has it sent back to his mansion in Florida. When Creed returns home a few weeks later, the falcon has somehow become much younger. Creed then follows the falcon into a nearby forest and accidentally steps into a small pond. Later that afternoon, Creed's assistant and butler go out looking for him. They find a baby in the pond, unaware that it is actually Creed. He has stumbled upon the Fountain of Youth.
Appearing in "Million-Dollar Magic"
Featured Characters:
- Casper Creed (Single appearance)
Supporting Characters:
- Jenkins, Casper's servant (Single appearance)
Animals:
- Ishtar, a falcon (Single appearance)
Other Characters:
- Hoda (Single appearance)
- James Wood (Single appearance)
Locations:
Items:
- A pearl scarab
Synopsis for "Hail the Conquering Aliens"
This story is reprinted from House of Mystery #103.
Dan Welks returns home after a long business trip, only to discover that his hometown has been overrun by aliens. After seeing that the aliens are brainwashing the town's children, he meets up with a small group of people who have formed an underground resistance. Eventually, the members of the resistance tell Dan that he is taking the game too seriously. Dan is embarrassed to learn that the whole invasion has just been a test run in case of an actual invasion - the "aliens" are simply people in costumes. But just then, real aliens arrive in the town and start attacking the people in alien costumes. Dan runs into harm's way and saves a man who was dressed as an alien. Suddenly, the real aliens apologize. They explain that they have been stranded on Earth, trying to repair their ship. But just as they were about to leave, they noticed that the town was being invaded, so they tried to stop the threat. With the misunderstanding resolved, the aliens go in peace, and the townsfolk celebrate.
Appearing in "Hail the Conquering Aliens"
Featured Characters:
- Dan Welks (Single appearance)
Supporting Characters:
- Hal (Single appearance)
- Colonel Bear (Single appearance)
- Aliens (Single appearance)
Other Characters:
- Mayor Plover (Single appearance)
- Betty Sears (Single appearance)
Locations:
- Hayesburg
Vehicles:
- Army tank
- Alien war tank
Synopsis for "The Demon Within!"
When a family concerned with their social standing in the community discover that their little son has the power to shapeshift into a demon-like monster at will, they give the boy a pre-frontal lobotomy just so that he does not embarrass them.
Appearing in "The Demon Within!"
Narrator:
Featured Characters:
- Gary Winters, Jr. (Single appearance)
Supporting Characters:
- Gary Winters (Single appearance)
- Mildred Winters (Single appearance)
- Kathy Winters (Single appearance)
Other Characters:
- Martin (Single appearance)
Locations:
- An undisclosed town
Synopsis for "A Tale of Vengeance!"
Appearing in "A Tale of Vengeance!"
Narrator:
Featured Characters:
- Chet Yovac (Single appearance; dies)
Supporting Characters:
- Mr. Yovac (As a spirit)
- Whitney Claymore (Single appearance)
- Miss Claymore, Whitney's daughter (Single appearance)
- Andrew (Single appearance)
Antagonists:
- Joey (Single appearance)
Other Characters:
- Mrs. Yovac (Single appearance; dies)
Locations:
- An undisclosed town
- Coal Mine 32
Notes
- The following stories and features are reprinted in Showcase Presents: The House of Mystery Vol. 2:
- Cain's prefaces that introduce each story, which were drawn by Bernie Wrightson
- "Put Your Trust in a Killer!"
- "Cain's Game Room", which was drawn by Sergio Aragonés
- "The Demon Within!"
- This story was also reprinted in Limited Collectors' Edition #C-52, DC Special Blue Ribbon Digest #24, Wrath of the Spectre #4 and Welcome Back to the House of Mystery #1.
- "A Tale of Vengeance!"
See Also