A baby alligator is flushed down a Chicago toilet and survives by eating discarded lab rats, injected with growth hormones. The now gigantic animal, escapes the city sewers, and goes on a rampage, pursued by a cop and a big-game hunter.
When the first manned flight to Venus returns to Earth, the rocket crash-lands in the Mediterranean near a small Italian fishing village. The locals manage to save one of the astronauts Colonel Calder, the mission commander. A young boy also recovers what turns out to be a specimen of an alien creature. Growing at a fantastic rate, it manages to escape and eventually threatens the city of Rome.
Two hapless freight handlers find themselves encountering Dracula, the Frankenstein Monster and the Wolf Man.
A scientific expedition searching for fossils along the Amazon River discover a prehistoric Gill-Man in the legendary Black Lagoon. The explorers capture the mysterious creature, but it breaks free. The Gill-Man returns to kidnap the lovely Kay, fiancée of one of the expedition, with whom it has fallen in love.
While the gang travel to Scotland to visit Daphne's cousin and witness the Highland Games, they find themselves terrorized by the legendary Loch Ness Monster.
In their quest to confront the ultimate evil, Percy and his friends battle swarms of mythical creatures to find the mythical Golden Fleece and to stop an ancient evil from rising.
In an alternate universe, very different versions of DC's Trinity fight against the government after they are framed for an embassy bombing.
When Mystery, Inc. are guests of honor at the grand opening of the Coolsville Museum of Criminology, a masked villain shows up and creates havoc before stealing the costumes of the gang's most notorious villains...Could it be that their nemesis, mad scientist Jonathan Jacobo has returned and is trying to recreate their deadliest foes?
Trace the history of Hitler's armored private train, a 15-car mobile headquarters boasting state-of-the-art communications and anti-aircraft cannons.