There's A Demon Shark in the Foggy Dark / The Awful Ordeal With The Head of Steel The Scooby-Doo/Dynomutt Hour : Season 1 Episode 12

There's a Demon Shark in Dark (Scooby-Doo): There's a demon shark in the foggy dark. The gang gets tangled up in a mystery revolving missing pearls and a million year old shark monster. The Awful Ordeal with the Head of the Steel (Dynomutt): The awful ordeal with the head of the steel Ironface, bearing a rather bitter grudge, seeks revenge on Big City and kidnaps the district attorney.