Doctor Who: Who Wants To Live Forever part five

The battle for Chiron has reached its final hours. With the planet’s terraforming system failing, enemy forces closing in, and the Doctor temporarily out of the fight, there may be no one left to stop catastrophe. And deep inside the Castlebrook Foundation, Loki is preparing to put the Doctor’s work to the ultimate test — whether anyone is ready for the consequences or not. As Chiron grows colder and time runs out, Hannah, David, Michael, and Victoria must each decide just how far they are prepared to go to save a world. Classic Doctor Who...the way you remember it.