Doctor Who S09E07: The Zygon Invasion from IMDb
The fragile peace between the Humans and the Zygons is on a knife edge. Tensions run high as factions within the Zygon community seek to incite violent action against Humans. Called in by UNIT, the Doctor and Clara fight to bring the situation under control. But one question remains: Where on Earth is Osgood?
Doctor Who S09E06: The Woman Who Lived from IMDb
England, 1651. A deadly highwayman known only as 'The Knightmare' plagues the dark streets of London, his fire-breathing accomplice by his side. There's something clearly more than human here, and that includes the loot as much as the outlaws. Who are these creatures, and are they enemies to be fought, or friends who might possibly save the Doctor from certain doom on the gallows?
Doctor Who S09E05: The Girl Who Died from IMDb
In a Viking village, a girl named Ashildr is about to make a desperate mistake. The Mire are the deadliest mercenaries in the galaxy, famed for showing no mercy and Ashildr has just declared war on them. The Doctor and Clara have 12 hours to turn a peaceful village into strong fighters, ready for the deadly Mire.

So who is the Fisher King? And that rock theme at the beginning…

Watched on Netflix.

Doctor Who S09E04: Before The Flood from IMDb
In a town that never was, the Doctor and his friends are being stalked by a mysterious figure. With the past and future in the balance, can the Doctor stop the evil Fisher King? And more importantly, who composed Beethoven's 5th.

So do ghosts exists? The Doctor investigates…

Watched on Netflix.

Doctor Who S09E03 : Under The Lake from IMDb
Under a lake a gleaming black spaceship is recovered but there is nothing inside. When the base crew start dying, they discover that ghosts are real. The Doctor and Clara arrive to find the base under siege and the Doctor discovers that this is more than a ghost story.