Last in the present series of real life rescue stories, introduced by Michael Buerk. Tonight, how a stroll in the Yorkshire countryside left a 65-year-old woman struggling to stay alive after she was bitten by adders, the only poisonous snake in the UK - followed by medical advice on dealing with snakebites.
There's also the rescue of two rally enthusiasts whose car veered off a forest track and plunged down a 1,000ft ravine in South Wales, and details of how to help save a life by carrying an organ donor card. Series producer Andrea Brown
Executive producer Andy Batten-Foster