Lomax (Spearhead from Space)
From Tardis Wiki, the free Doctor Who reference
Dr Lomax worked in the pathology laboratory at Ashbridge Cottage Hospital.
He was not amused when Dr Henderson sent him a blood sample that was not human. Thinking it a prank and a waste of his time, Dr Lomax paged Dr Henderson who rung him back whilst en route to radiology to find the culprit behind what Henderson similarly thought was a prank: two hearts appearing on the chest X-ray film of his new patient. Dr Henderson assured a sceptical Dr Lomax that he drew the blood himself from an adult male patient and that it was his responsibility to care for him, whether that made him a doctor or a veterinarian. (TV: Spearhead from Space)