Doctor Who discovers what puts the evil into evolution when he takes on prehistoric beasts in his newest adventure.
Details of the next series of the Timelord's adventures reveal Matt Smith's hero will star in episodes called Dinosaurs on a Spaceship and a western-themed story called A Town Called Mercy.
They will follow the first episode of the new series, which returns this autumn, which reunites him with his oldest enemies in Asylum of the Daleks.
The Doctor Matt Smith during filming for the new series
Show supremo Steven Moffat said: "Dinosaurs on a Spaceship - what more do you need? The Doctor will come face to face with some of the most monstrous creatures evolution has ever produced, on some of the most monstrous sets we've ever built. We took one look at Chris Chibnall's brilliant script and said to ourselves 'We're going to need a bigger corridor'.
"And Toby Whithouse's A Town Called Mercy takes us into a genre Doctor Who hasn't attempted since the sixties - it's a full-blooded western. We knew from the start we need some serious location shooting for this one, and given the most iconic American setting imaginable, there was only one place to go - Spain."
Dinosaurs on a Spaceship stars Fast Show funnyman Mark Williams as the father of Arthur Darvill's Rory and Sherlock star Rupert Graves.
The new series of Doctor Who returns later this year followed by a Christmas special and another eight episodes next year.