Elementary: Lesser Evils

Holmes is conducting research in a hospital morgue when he stumbles upon a string of murders, crimes that went undetected by the staff as the victims were all weak or terminally ill. Tapping into his own vast knowledge of pathology, as well as Watson's medical knowledge, the sleuth deduces the people were killed by one of the medical staff - a so-called `angel of mercy". Now all he has to do is find the culprit before more lives are claimed. Jonny Lee Miller and Lucy Liu star