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.
Episode 1
A surgeon's morals are tested after he sets up an illicit clinic beneath London.
Episode 2
The clinic's secrecy falls into jeopardy when Daniel puts Beth's ex-colleague Anna in an impossible position.
Episode 3
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
Episode 4
Things grow complicated between Daniel and Anna as they battle to save someone they love. Lee takes a risk that endangers them all
Episode 5
Daniel's descent reaches new depths as he enters the world of organ trading. As police and gangsters close in, Jamie makes an error.
Episode 6
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?
Episode 7
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?
Episode 8
As Mercy and Keith close in, Daniel, Lee and Anna discover just how far they'll go to save themselves.
