Chief instructor Rudy Reyes puts Ashley Cain and Maisie Smith to the test, challenging them to get all their equipment across a body of water by zipline, without it getting wet. Finally, back in the blistering heat of the Jordanian desert, two teams of recruits must work out how to load and pull a 200kg sled loaded with equipment up a narrow ravine.

The seven celebrity recruits face the final and most brutal phase of the course. Captured by the Hunter Force while trying to escape, they're questioned by a specialist team of interrogators with over 40 years of experience in war zones. The recruits must keep to their cover story, while subjected to punishing interrogation techniques, including ice baths and being buried in a box in a bid to force a confession.