After Grandpa tells his story about a dragon guarding water on Mars, Mandy and Kyle jet over to the Adler Planetarium and meet planetary scientist Mark Hammergren to learn the truth about Mars.

Did you know that tornadoes are made from grabinators and hoagies? Neither did Kyle and Mandy, until Grandpa told his story. To check the facts, the detectives head to Museum of Science and Industry and meet with physicist Olivia Castellini.

Mandy think she's the best at everything until grandpa tells his story about Moochie Kalala in a contest with a Chimpanzee and a Gorilla. To check the facts, she and Kyle will meet Primatologist Steve Ross at the Lincoln Park Zoo.

Grandpa's story puts Moochie Kalala toe-to-toe with a T-Rex. People and dinosaurs did not live at the same time. Or did they? Paleontologist Bill Simpson from The Field Museum helps Mandy and Kyle explore the facts.

Moochie is rescued at sea by a singing Beluga whale. Once again, Grandpa's crazy story sends Kyle and Mandy on a journey to Shedd Aquarium to discover the facts from marine animal trainer Elizabeth Davis.