This edition: The Scent of Darkness, Part 1 of 2

Episode Details
First aired: October 5, 2017.Jane Tennison sent George Marlow down for six brutal murders. Now, two more women turn up dead with the same markings, doused in the same perfume. Is this a copycat killer or did Tennison get it wrong? How did the copycat get access to confidential information about Marlow's killings unless he was the killer all along?

