In Sydney, Leichhardt Bus Depot, one of the largest in the Southern hemisphere, the team has to scramble to repair two buses before the morning rush hour.
Tensions are high at the Gilmour Space Technologies test facility on the Gold Coast, where the team prepares to put their brand new rocket through its second test.
The team at Murray 1, Snowy Hydro's second-largest power station, reassemble a massive power turbine after they find extensive cracking in the top cover.
In Central Queensland, the army mechanics from the 2nd/14th Light Horse Regiment have two hours to overhaul a tank suspected of hoarding unwanted debris.
One of Australia's largest hydro power stations undertakes a high stakes valve replacement; they have six hours to get the 800kg replacement part down six stories.