Scooby-Doo, Where Are You!

A Gaggle of Galloping Ghosts (1x11)

Air date: Nov 22, 1969

The gang, on their way to the Frankenstein castle, visits a gypsy who warns them not to go. They ignore her warning and go anyway. The trouble begins when Daphne is taken hostage and the gang finds themselves in the clutches of a trio of monsters.