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Lurking in Big City is The Shadowman, who mysteriously knows all of the plans of The Crime Commission. The Daring Duo are called in when the 700-karat Shmope Diamond is swiped. As they respoind, they spot a shadow sneaking off with plates for new $20 bills stolen from an armored car. The Shadowman later manages to kill two birds with one stone by making off with a secret gold shipment and framing Mayor Gaunt (who is captured in The Dyno Bad Guy Box) all in one shot.
Episodes
1The Swiss Alps 2The Kooky Case of the Cryptic Keys 3The Curse of the Viking Lake 4Beastwoman (1) 5Tokyo, Japan 6Acapulco 7The Mixed Up Mystery of Deadman's Reef 8Vampire Bats and Scaredy Cats 9Beastwoman (2) 10England 11Florida 12What a Flight for a Fright 13Hang in There, Scooby-Doo 14The Glob (1) 15China 16The Sahara Desert 17The Creepy Case of the Creaky Charter Boat 18The Chiller Diller Movie Thriller 19The Glob (2) 20Scotland 21France 22Big Scare in the Big Top 23The Spooky Case of the Grand Prix Race 24Madame Ape Face (1) 25Australia 26Athens, Greece 27Double Dribble Riddle 28The Ozark Witch Switch 29Madame Ape Face (2) 30The Ozarks 31Italy 32The Crazy Case of the Tell-Tale Tape 33The Creepy Cruise 34Shadowman (1) 35Kitty Hawk, North Carolina 36Egypt 37The Creepy Claw Caper 38The Creepy Heap from the Deep 39Shadowman (2) 40Sherwood Forest 41Spain 42Cavey and the Kabuta Clue 43The Himalayas 44India 45Cavey and the Weirdo Wolfman 46Israel 47Africa 48The Disappearing Elephant Mystery 49San Francisco 50The Grand Canyon 51The Fur Freight Fright 52Ireland 53Hawaii 54Ride 'Em Caveman 55Norway 56North Pole 57The Strange Case of the Creature from Space 58Tahiti 59Arizona 60The Mystery Mansion Mix-Up 61Holland 62Quebec 63Playing Footsie with Bigfoot 64Baghdad