"Unbelievable Beast!"
Velma's cousin, Dexter, is arrested by the police for vandalizing the school but his story does not check out since he blames it on a strange monster. He calls his cousin and Mystery Inc. comes out to investigate the strange story. No one really believes him, except for Velma, but Mystery Inc. discovers the real vandal, a classmate of Dexter's.
"The Shadow Knows"
The gang is called in to investigate a ghost haunting an old inn and Shaggy uses the case to enhance his photo album. But his new hobby takes a picture of the ghost putting on his costume. Even though they cannot see the face, the features of the person gives it away as they expose the groundskeeper of 20 years.
"The Crossword Clue"
The gang are chasing a ghost who leaves crossword puzzles for clues. The gang figure out the crossword clues and trip up the villain.