When the Doctor gets a call from an old friend on Earth who’s in mortal danger he and Clara spring into action, but what the Time Lord doesn’t realise is that to save his pal’s life he’ll have to face a host of his greatest enemies!



The friend in distress is Rigsy, the graffiti artist who first met The Doctor and Clara during last series. He finds a number mysteriously tattooed on his neck and begins to worry, but when he realises the number is counting down to zero he knows he’s in deep trouble…



The Doctor knows the tattoo is a countdown to Rigsy’s death and to save him he must find a secret street in London, which has become home to a collection of fearsome aliens from across space and time including Cybermen, Judoon, and a mysterious Raven which carries out a death sentences on poeple who disobey the laws of the street! And it can find who it needs to find anywhere in the unvierse.



Rigsy isn’t the only old friend that The Doctor and Clara bump into. When the trio eventually find the secret London street, they discover the only person who can stop the tattoo countdown and save Rigsy’s life is Ashildr (Maisie Williams), the Viking girl who the Doctor made immortal earlier in the series… But Ashildr, posing as Madame Mayor this time, has put the death sentence on Rigsy for unwittingly causing the death of one of the street’s inhabitants.



Things also get very dramatic for Clara. The pair built up a close friendship when they met last year, but before long it’s the Doctor’s companion who finds herself in terrible danger. She takes over the death sentece from Rigsy, believing it can’t happen to her. But alas she’s wrong. Ashildr can do nothing and there are some very emotional scenes between Clara and the Doctor as Clara awaits her tragic fate and the Raven flies into to her to end her life.

It leaves the Doctor devastated and angry, and he warns Ashildr, who he blames for Clara’s death, that she should steer clear of him in the future…