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Maggie becomes the prime suspect for a hit and run accident on one of her patients, Susan. But Nick suspects Susan and her mortally ill boyfriend Michael are protecting the real culprit when incriminating evidence goes missing. Meanwhile, Greengrass and Bernie Scripps, the local undertaker/mechanic, buy a rare samovar from a family of Russian Gypsies. Elsewhere, Nick begins his sergeant's exam, as he plans a holiday for himself and Jo.