Where To Stream Department S Season 1 Episode 21

In the middle of performing an operation on a British public servant, the surgeon is secretly replaced by an unknown man, who finishes the operation... When this is discovered, the initial suspicion is that the 'replacement' botched it up on purpose - however, it turns out he performed it flawlessly. So why was the surgeon replaced at all? Since the man who was operated on is an important public figure, this delicate case is referred to the Department. The surgeon at the hospital says that the...