Christopher is 14-years-old, and the leader of The Puzzle Club. He has a good sense of humor and keeps an open mind about the clues in any of the cases. He's very smart and gets very excited when there is a mystery to solve. Never without his camera, Christopher is responsible for photographing the various crime scenes.

Korina, 13, is well organized and spends a lot of time deep in thought. She is handy with machines and computers and can quickly invent any kind of mechanical device The Puzzle Club might need. Korina is rarely without her magnifying glass and fingerprinting kit.

Alex, is the youngest member of The Puzzle Club. At 11 years old, he has a very active imagination and loves dreaming up outlandish explanations for mysteries. Alex loves to come up with disguises so the group can search for clues undercover.

Tobias, owns Puzzleworks, a shop that sells puzzles. Before Puzzleworks, Tobias owned a "Curiosity Shop" and then a pet store that he called "Tobias' Ark." Now he helps The Puzzle Club with their mysteries. Tobias is very friendly and most of the people in his neighborhood know him. He loves to be around children. That's one of the reasons the headquarters of The Puzzle Club is located in the attic above his store.

Oh, yes, there is one other member of this group...a "detective" in his own right: Sherlock, a playful parakeet, goes everywhere the team goes, and at times is instrumental in finding an important clue. A bit of a scaredy-cat, Sherlock tends to over-react to almost everything.