- The Mystery of the Mumbling Mummy/The False Alarm Mystery
- The Missing Coupon Cookie Mystery/The Mystery of the Broken Boat
- The Mislaid Sketchbook Mystery/The Hot and Cold Mystery
- The Sandcastle Squasher/The Strange Ski Tracks Mystery
- The Mysterious Color Changing T-Shirt/The Metal Finger Mystery
- The ''Now You See It, Now You Don't'' Mystery/The Mystery of the Missing Pirate Gold
- The Disappearing Dolly Mystery/The Vanishing Vehicle Mystery
- The Busytown Lake Monster Mystery/The Bad Driver Mystery
- The Vanishing Hopscotch Mystery/The Hidden Treasure Mystery
- The Mystery of the Lost Camera/The Jellybean List Mystery
- The Lost Key Mystery/The Door Knocker Mystery
- The Red Spot Painter Mystery/The Teeny Weeny Piano Mystery
- The Flattened Field Mystery/The Flying Potatoes Mystery
- The Totally Fishy Mystery/The Radio Message Mystery
- The Numbered Papers Mystery/The Sour Milk Mystery
- The Delayed Delivery Mystery/The Busytown Fairies Mystery
- The Mystery of the Lost Bag/The Flat Tire Mystery
- Huckle Unlocks a Mystery/The Messy Car Mystery
- The Achoo Mystery/The Missing Laundry Mystery
- The No News Today Mystery/The Big Tooth Mystery
- The Big Ten Mystery/The Whistle Blower Mystery
- The Mystery Invitation/A Spoon Full of Mystery
- The Whoop Whoop Whoop Mystery/The Missing Mayor Mystery
- The Apple Orchard Spaceman Mystery/The Pick and Run Mystery
- The Sleepytown Mystery/The Mystery of the Switched Cars
- The Admiral Hornblast's Nameplate Mystery/The Secret Spy Ring Mystery
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