The heat's turned up and so is the drama; two tourists clash with police over boozy behavior; Sean and Hollie treat a man whose foot gets crushed by a taxi.
Veteran Diesel takes on Billy, the new puppy on the block, as they hunt for hidden heroin, but Diesel later causes annoyance for his handler PC Adele Gibson during a crackdown on knives and drugs.
After Justin Harris severely breaks his leg deep in a remote, Utah canyon, it's up to his brother Jeremy to climb out for help. Clawing his way through icy pools of water and up rock faces, pushes Jeremy to his limit.
Ed Rosenthal set out for a short hike in Joshua Tree National Park, but in the heat of the day he became turned around and lost. His six-day ordeal of survival in blazing temperatures with no food or water is nothing short of miraculous.
Craig DeMartino examines the stories of other survivors he's met across the season. Their survival stories are all different, but Craig discovers that these survivors share more in common than you might think.
In Hertfordshire, the heli-medics help a man fighting for his life following a cardiac arrest; a tumble on an obstacle course leaves fun-runner Vijitha with a painful open fracture; 7-year-old Imogen suffers an impalement at the bike track.
Two new recruits, Eddie and Keela, are brought in from the South Yorkshire police force after assisting in such high-profile cases as the search for Madeleine McCann and investigations into alleged child abuse in Jersey.