"Riverboat"@en . . . . . "The Louisiana riverboat was one of the \"haunted\" places Mystery Inc. investigated for Daphne Blake's TV show."@en . . "Scooby-Doo On Zombie Island"@en . . "Riverboat (Scooby-Doo On Zombie Island)"@en . . . . "The Louisiana riverboat was one of the \"haunted\" places Mystery Inc. investigated for Daphne Blake's TV show."@en . . .