Series finale: Claire's boys are locked in mini caskets and before she can save them, a nurse injects her with a sedative. In a big country house, Peter descends in an old-fashioned lift to a dusty, forgotten gentlemen's club. There are six floors hewn deep into the ancient building's foundations - hell is on the lowest floor. They are hiding a secret; the building needs to be a fortress - and a trap for a man who can rip out a lion's throat.

• Steven Moffat
• Robert Louis Stevenson

• James Nesbitt
• Gina Bellman
• Michelle Ryan