When a meteorite splashes into the sea, Dad and Cosima cause problems by claiming it in the name of science, against the wishes of the sea creatures.

Dad needs some training to pass his astronaut fitness test. Cosima and Big Lizard put him through his paces! When Rex gets into trouble, Dad's hard work finally pays off.

When the buggy gets a flat tyre, Dad, Cosima and Big Lizard are stranded. Big Lizard's playful nature helps reveal a creative solution to their problem.