Doctor in the House

Amazing Grace (4x18)

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Reggie Grace is a hapless, clumsy medical student but Collier has given him a good report because he fancies his sister, so when a party of big-wigs come to visit the hospital Grace is charged with showing them round. To cause a diversion Collier feigns illness and collapses. The plan is that he supposedly has glandular fever but Reggie correctly diagnoses a slipped disc and is declared the hero of the hour by the visitors.