When intelligence agents around the world come under attack from alien forces, MI6 turns to the only person who can help... The Doctor.

A terrifying plan to destroy humanity is about to reach fruition. Can the Doctor and her friends escape multiple traps and defeat a deadly alliance?

Having decided that everyone could do with a holiday, Graham accidentally teleports himself, the Doctor Yasmin and Ryan to a luxury resort for a spot of rest and relaxation. However, they discover the place where they are having a break is hiding a number of deadly secrets. What are the ferocious monsters that are attacking Tranquility Spa?

The time: the earliest years of the 20th century. The place: New York City. Inventor Nikola Tesla is at war with his rival Thomas Edison. However, there's an even greater threat in their midst.

Stomping their way into present-day Gloucester, the Judoon are on the hunt for someone on the run. Who is this fugitive? And why are these alien mercenaries after them?

The Doctor and her friends split up to investigate multiple mysteries across planet Earth. What they find will threaten all of humanity.

From ancient Syria to present day Sheffield, and out into the wilds of space, something is stalking the Doctor and infecting people's nightmares.

Villa Diodati, 1816 - on a night that inspired Mary Shelley's Frankenstein. The plan was to spend the evening in the presence of literary greats - but the ghosts are all too real. And the Doctor is forced into an earth-shattering decision.

In the far future, the Doctor and her friends face a brutal battle across the farthest reaches of space to protect the last of the human race against the deadly Cybermen.

In the epic and emotional season finale, the Cybermen are on the march. As the last remaining humans are ruthlessly hunted down, Graham, Ryan and Yaz face a terrifying fight to survive. Civilisations fall. Others rise anew. Lies are exposed, truths are revealed, battles are fought, and for the Doctor - trapped and alone - nothing will ever be the same again.

Robertson returns, and inadvertently gives the mutant Dalek a chance to clone itself. The Doctor escapes from her alien prison with the help of an old friend, and returns to help.