The Sultan of Zanzibar has a harbor infested with sharks, which makes it impossible for ships to trade with him. In an attempt to fix the problem, he brings twelve hippos into the harbor to keep the sharks away. His idea works well enough, but once the hippos are no longer a novelty and the people no longer feed them, they begin to starve. After the hungry hippos rampage through the city looking for food, Aban-Khan, the king's adviser, slaughters all the hippos except one, a little hippo named Hugo.

Calamity Jane tries to help Buffalo Bill Cody and Wild Bill Hickock stop an Indian war.

After a traffic accident Kaylie is in coma for months and her doctors want to try a new procedure on her. To regain her consciousness, they stimulate her brain with the neural patterns of a woman who has just died. It works and Kaylie fully recovers. However, she begins to relive the dying moments of her donor and realizes that she was murdered! Along with her husband and mother, she tries to find out what happened.

Sequel to Cotton comes to Harlem. Another bad influence is hitting Harlem and Gravedigger and Coffin Ed are the two cops who will stop it. Charleston Blue was a prohibition era black gangster, dead 4 decades. When he seems to have reappeared, once again slitting throats with his Blue straight edge razors, the two cops begin a complicated search for some answers

Demonstrating that a little knowledge is a dangerous thing, a convicted strangler studies the paranormal and finds a way to render himself invisible. Once he escapes, he sets out to find and eliminate five women who remind him of the mother he murdered. A police lieutenant sets out to safeguard them and bring the invisible killer to justice.

A scientist who has been preserved in suspended animation wakes up to find himself in a primitive society in the future.