In Scooby-Doo! Mystery Incorporated , the "piece" you're likely thinking of is a segment of the . This ancient, enigmatic artifact is central to the show's overarching mystery and is broken into six distinct pieces. The Planispheric Disk
: One critical piece was hidden by Fred's "father," Mayor Fred Jones Sr., which Professor Pericles eventually steals. Scooby-Doo! Mystery Incorporated ...
Check out these key moments and full episodes to see the Mystery Inc. gang in action as they hunt for the truth behind Crystal Cove: In Scooby-Doo