Anthony Flanagan

The death of a veterinary surgeon uncovers ties to a private community as the team investigate a closed network.

Environmental terrorists storm the Thames Barrier and threaten to flood London unless a document known as Aftermath is published. The document reveals the government's plans to abandon attempts to tackle global warming and instead build on economic and military strength, so that Britain and America can control the remaining resources. Will Harry sacrifice his best officers to protect London and secure the government's lies?

Lister speaks to her aunt about her hopes for a future with Ann Walker; the Rawson brothers continue their efforts to outmanoeuvre Lister in the coal business; Marian feels annoyed that her sister treats Shibden like a hotel.

As a spaceship hurtles towards the sun, The Doctor and Martha have just 42 minutes to save the day.