A surfer has a heart attack while out in the water. Dr Caitlin and Dr Martin are not sure they can save him, Dr Mya helps a mum with agonising leg injuries after she was squashed between a motorbike and 4WD.

Dr Catriona fears a tradie might lose his sight after a workplace accident; Dr George and Dr Rosie need to electrocute the heart of a father of two; a freak quad-bike accident has a race-track worker needing all of Dr Michelle's skills.