Man puts razors in Halloween candy apples

When two young lovers are savagely beaten and tortured on a back country road in Texarkana, local police are baffled and must find "the Phantom Killer" before he can kill again.

A masked maniac terrorizes the same small community where a murderer known as the Phantom Killer struck decades earlier.

Mystery Inc. has cracked the case to top all cases! They’ve tracked down Coco Diablo, the head of a notorious costume crime syndicate. With Coco and her kitty in prison, Mystery Inc. thinks that they can finally enjoy a break. Wrong! Suddenly, menacing doppelgänger ghosts of the Scooby crew and favorite classic foes show up in Coolsville to threaten Halloween. Now it’s up to the meddling kids to unmask the latest scoundrel and save Halloween!

When the nephews come to Donald's house in their Halloween costumes he dumps water on them and laughs at his trick. A witch sees this and decides to help the kids. By magic she gives Donald a bad time and the kids finally get their treats.

Ricky is released from a mental hospital, taking with him the memory of his brother Billy's death and embarking on a journey of relentless revenge.