London Kills (season 2)

At the center of this story is an elite unit of London detective inspectors. They investigate murders. Inspector David Bradford comes back to service after three months break related to his wife disappearance. His subordinates are sergeant Vivienne Cole (she is a profiler), a severe and experience detective named Rob Brady and a rookie named Billie Fitzgerald, a good-natured girl whose inexperience may let the whole team down.