S1·E4 Hidden Agenda

Deed presides over a murder trial. An old man suffering from cancer died from a morphine overdose, and his attractive young woman doctor has been charged with murder, on the accusation of the dead man's niece. The doctor is acquitted, following a patholigist's evidence that the cause of death was beta blockers in the medication building up in the old man's liver, so the increase in dose from 50mg to 200mg had not affected the outcome... But then the doctor comes to Deed and confesses that she intended to kill her patient. When the Lord Chancellor's Department gets wind of this development, they suggest Deed was sleeping with the doctor - but with Jo's help, he is able to neutralize this threst.