Episode 5

Dr David Lalloo tracks venomous snakes in Sri Lanka, and observes the deadly effects their bites have on unsuspecting victims. Dr Bertie Squire investigates an unsolved mystery illness spreading through a patient’s lung. Major Tom Fletcher is challenged to diagnose a sick traveller with a unrecognisable bug. A junior doctor new to the Unit is confronted with the disfiguring Leishmaniasis parasite and in search of a cure, the patient must go through a gruelling treatment.