Writer: Douglas Booth
Original Airdate: September 22, 1984
Duration: 11 minutes
When the heroes arrived on the island, two bad men were plotting to turn the world's leaders, plus Scooby and the gang, into stone. The mastermind was showing the intended effects on computer monitors, ending with Scooby's gang.
When the gang arrived to Cyclops' cave on top of the mountain, the gang were caught trespassing, Daphne ran away, and Scooby and Shaggy jumped and clung on to a stalactite hanging from the roof of the cave. Scrappy leaped into action, attempting to land on Cyclops' stomach. When Shaggy and Scooby lost their grip, they fell onto Cyclops' body, and Scrappy covered Cyclops' eyes, and released the mask. Daphne came skidding in with flashlight in hand and retrieved the mask, but the mastermind took the mask and threatened to turn the gang into stone.
When the mastermind looked through the mask, he learned that it was a fake, and threw it on the ground. Scooby was curious to see if the mask worked, and shone Daphne's flashlight through the mask, and successfully turned Daphne, Shaggy, Scrappy, and the three male suspects into stone, despite Shaggy's warning. Scooby started to regret his action, and Anna questioned what was going on. Scooby claimed he didn't do anything, likely out of fear of consequences.
Anna suggested that Scooby reverse the mask and shine the light through it. Scooby successfully reverted them to human form, and kissed Shaggy. Scrappy was wondering why one of the stone figures was not back to human form, and Daphne revealed Cyclops as Professor Mikos, who was the culprit. Daphne explained that the stone version of Mikos was designed to have the real Mikos trick the visitors into leaving the island.
- This segment was never rebroadcast on Scooby's Mystery Funhouse during the 1985-86 season.
- This segment was part of the DVD compilation Scooby-Doo! 13 Spooky Tales: Run for Your 'Rife! released in September 2013. It is the second segment on Disc 2.
- Continuity error: When the mastermind displayed morphing his targets on computer screens, the stone versions appeared to be a darker shade of gray. When Scooby turned the gang to stone by mistake, the stone versions looked to be a lighter shade of gray.