The Haunted Horseman of Hagglethorn Hall (S01E13)

S01E01 The Ghastly Ghost Town S01E01 The Case of the Curious New Girl / The Case of the Disappearing Deliveries S01E02 The Case of the Missing Solar System / The Case of the Distressed Dancer S01E02 The Dynamic Scooby-Doo Affair S01E03 The Case of the Sleepover Secret / The Case of the Big Mouth Challenge S01E03 Wednesday is Missing S01E04 The Case of the Pestering Prank Caller / The Case of the Spoiled Sports Day S01E04 The Frickert Fracas S01E05 The Case of the Exciting Excursion / The Case of the Very Lost Notebook S01E05 Guess Who's Knott Coming to Dinner S01E06 A Good Medium Is Rare S01E06 The Case of the Suspect Sprinkler / The Case of the Peculiar Pop Quiz S01E07 Sandy Duncan's Jekyll and Hyde S01E07 The Case of the Science Sabotage / The Case of the Wrecked Rehearsal S01E08 The Secret of Shark Island S01E08 The Case of the Perplexing Painting / The Case of the Turtle Thief S01E09 The Spooky Fog S01E09 The Case of the Misplaced Mug / The Case of the Sad Little Sister S01E10 The Ghost of Bigfoot S01E10 The Case of the Disoriented Drone / The Case of the Baffling Birthday S01E11 The Ghost of The Red Baron S01E12 The Ghostly Creep from the Deep S01E13 The Haunted Horseman of Hagglethorn Hall S01E14 The Phantom of the Country Music Hall S01E15 The Caped Crusader Caper S01E16 The Loch Ness Mess