Talented and successful surgeon Daniel Milton has his world shattered when his wife Beth develops a fatal degenerative disease. After conventional treatment options run out, Daniel partners with the lonely yet resourceful Lee to start a literal Underground clinic in the vast network of tunnels beneath Temple Tube Station in London.
A surgeon's morals are tested after he sets up an illicit clinic beneath London.
The clinic's secrecy falls into jeopardy when Daniel puts Beth's ex-colleague Anna in an impossible position.
Daniel finds he's moving far away from the man he thought he was, as dealing with London's most dangerous people brings big problem
Things grow complicated between Daniel and Anna as they battle to save someone they love. Lee takes a risk that endangers them all
Daniel's descent reaches new depths as he enters the world of organ trading. As police and gangsters close in, Jamie makes an error.
Hall and Moloney get a break in their hunt for Jamie. Daniel faces the ultimate question - how far will he go for someone he loves?
Daniel crosses a line from which he can never return. Lee's forced to make a big decision about the clinic. But will it be too late?
As Mercy and Keith close in, Daniel, Lee and Anna discover just how far they'll go to save themselves.
Mark Strong
Daniel Milton
Carice van Houten
Anna
Daniel Mays
Lee
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