3 Scooby Doo Meets The Earl Of Grantham by Mr. Chaos The crossover you never thought would happen! When Matthew invites his cousin Fred and his friends Shaggy, Scooby, Daphne, and Velma to visit Downton Abbey the gang is eager to see the estate. But the arrival of a phantom known as the Rotting Rider forces the gang into another mystery! Crack taken seriously.