

44 minSeason 2 • Episode 7
LatestDaniel refuses to let his daughter pay for his mistakes; Lee and Ash prepare to change the world; Anna is surprised by what she finds at the pharma company.
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.
Acting
Mark Strong's thousand-yard stare carries entire episodes.
Production
The actual abandoned tunnels under Temple station are nightmarishly real.
Writing
Mark O'Rowe's dialogue bites harder than the surgery scenes.
Trivia, insights & behind the scenes
The production couldn't secure filming rights in the real Temple station tunnels, so they built replica sets in Bulgaria based on extensive reference photography of London's actual abandoned Underground infrastructure.
The series arrived months before the UK's COVID-19 crisis, making its depiction of an overwhelmed surgeon driven to illegal practice feel almost prophetically uncomfortable in retrospect.