On the series return of MEDICAL EMERGENCY tonight, a young man is viciously assaulted for doing a good deed and a 35-year-old man has been rushed to hospital after he suffered a series of heart attacks while water skiing. Meanwhile, there's only one way to find out if this five-year-old is telling fibs - and the truth will come as a big surprise.

This week on MEDICAL EMERGENCY, a young man is rushed to hospital with life threatening symptoms; a mother and son have been in a terrible car crash; and a slammed door has painful consequences for a young childcare worker.

This week on MEDICAL EMERGENCY, a man has been injured by 60 kilos of falling concrete; a young woman has been attacked while out walking; and it's a busy day for the Air Ambos as flight paramedics are called from one accident to another.

This week on MEDICAL EMERGENCY, trauma staff at The Alfred are on high alert after a building collapse nearby; a young man has stapled his hand to a plank of wood; and helping dad has devastating consequences for one young lady.

This week on MEDICAL EMERGENCY, a headache turns a man's life upside down in a matter of hours; a teenage boy is rushed to Emergency after a high-speed crash; and some doctors become patients during a fiercely contested soccer match.