In this episode, the teams use powerful lasers to navigate their way out of escape-room chambers in a high-tech mirror maze, and design and engineer cargo-carrying rovers for tricky terrains. Steph also heads to Holsworthy Barracks for an off-road adventure in one of the Army’s iconic vehicles – the Bushmaster PMV.

Tune in to watch the teams use remote-controlled rovers in a race to recreate city maps, translate complicated code, and use their STEM knowledge to override a hacker in a computer terminal – all in a bid to make it to the finale. Plus, check out some incredible aircraft and meet a real-life astronaut at RAAF Base Richmond.

The stakes have never been higher for the title of Ultimate Classroom Champions. The final three teams will race to solve a series of puzzles against the clock, use chemistry equipment to purify an ethanol sample, and head to RAAF Base Richmond to build and fire their very own rockets for an explosive finale.