Dr Jackman’s life is in tatters. Recently, he’s been playing host to an uninvited guest – a dangerous alter-ego. Desperate to protect his wife and children from his dark side, Jackman has been forced to leave his old life behind and strike a diabolical deal with his own devil. Now the two share a body, and an impossible life is somehow lived. It takes a trusted assistant, lots of second–guessing and the best surveillance hardware around to keep the “night shift” in check.

Savage, carnivorous, carnal, Hyde is everything that the repressed Jackman is not – a narcissistic newborn in a grown man’s body, with a Disney habit to go with his drink problem. And he’s getting stronger. Every time Jackman falls asleep, gets angry or aroused – Hyde threatens to take over.

He won’t be chained up forever.

What neither of them knows is that an ancient organisation with limitless wealth and power is monitoring their every move, and a plan over a century in the making is coming to fruition.

Part conspiracy thriller, part horror, part love story, Steven Moffat’s dark and very modern take on the Robert Louis Stevenson classic brings the ultimate tale of inner conflict to unforgettable new heights.