Doctor Who (1963鈥�1996) Episodes Available now

The Ark in Space: Part 4—Season 12

Noah has now fully transformed into a Wirrn and intends to devour the sleeping humans.

The Doctor tries to access the memories of the dead Wirrn Queen.

The Ark has been invaded by the giant insectoid Wirrn.

The travellers land on the Ark and find mankind's survivors - in hibernation!

The Doctor races to avert a nuclear holocaust and the robot takes Sarah hostage.

Sealed inside an underground bunker, Miss Winters issues her demands to the world.

Harry Sullivan is sent to infiltrate Think Tank to discover the truth.

UNIT are called in when top secret plans are stolen from high security establishments.

The Doctor returns to Metebelis 3 where he must face the spiders' ruler, the Great One.

Sarah makes a bargain with the Queen Spider and returns to Earth with the Doctor.