Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this-world prizes. First, they must work out if an object is heavier or lighter than another, before placing it on a giant set of scales. Then, there’s a game based on sound and pitch, as Sam and Ayo play a tune using three hidden jars filled with different volumes of water. The teams must then figure out which order the jars go in to make the tune. Finally, a player from each team must memorise a pattern of animals on the Memory Path, before guiding their partner across it. In the lab, Sam and Ayo look at stopwatches and egg timers. Then, they have fun timing how long it takes them to carry out tasks.