Kirstie Collins, who is helping Muriel McKendrick with the trial of a new drug, finds a severe adverse reaction from a patient, and wants to alert the drugs company, but McKendrick warns her against doing so.
The staff of Darwin Ward, the cardiology ward, struggle to stop the spread of the life-threatening MRSA infection; suspicion about its origin falls on Nurse Julie Fitzjohn.
There's gossip about Nick Jordan and Karen Newburn.
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