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Dr Lalla is frustrated by summer fog, which means the air ambulance cannot land. To get his patient to specialist care, he urgently needs the coastguard helicopter, and the fog to clear.

A South African with Shetland roots learns to always listen to his mother. She convinces him to get his foot X-rayed after a nasty stumble, and a fracture is diagnosed.

And senior staff nurse Emma suspects the cause of an asthma attack is more serious than it first appears.