Two worlds collide when the Doctor meets Bill.
For her first proper trip, the Doctor takes Billy to a colony in the future. They discover that the skeleton crew has been wiped out, and a terrible fate awaits the awakening colonists unless they do something.
The Doctor takes Billy to the Great Frost Fair on the Thames in 1814... and they discover that something is living beneath the ice. Something huge, and hungry.
Bill and her mates receive an offer to move into an old house at a price they can't refuse. However, they soon discover that the price is much higher than promised.
The Doctor, Bill and Nardole discover that their spacesuits are trying to kill them!
The Pope asks the Doctor to investigate the mysteries of Veritas, a book that has caused everyone to read it to commit suicide. However, the Doctor soon learns that Veritas contains the real history of the universe… and it is enough to drive anyone to suicide.
When a 5,000-year-old pyramid appears, literally, overnight, Earth's military leaders are baffled. But there are far more serious implications for the planet, which soon become apparent…
Bill and Nardole must embark on a deadly mission to rescue the Doctor.
"Empress of Mars" is the ninth episode of the tenth series of the British science fiction television series Doctor Who. It is written by Mark Gatiss and was broadcast on 10 June 2017 on BBC One. "Empress of Mars" received generally positive reviews from television critics.
The Doctor, Bill and Nardole are led into a battle that could cast humanity into the dark.
A spaceship trapped in a gravity well harbors one of the Doctor's most feared enemies.
The Doctor must protect protect a tiny band of humans from destruction.