Scooby and the gang solve the mystery of a castle, which is haunted by Merlin and the Black Knight; the Blue Falcon and Dynomutt fight Manyfaces, evil master of disguise.
Scooby and the gang find a football player's malevolent ghost at the Wonder Bowl; Blue Falcon and Dynomutt battle six of their arch-foes, who are now fighting as the Injustice League of America.