“Doctor Who” Season 7 kicks off on Sat., Sept. 1 at 9 p.m. ET on BBC America.

BBC America released a trailer and official episode descriptions for the first three episodes of Season 7. Check them out below.

 
“Asylum of the Daleks” – Episode 1
Kidnapped by his oldest foe, the Doctor is forced on an impossible mission – to a place even the Daleks are too terrified to enter…. the Asylum. A planetary prison confining the most terrifying and insane of their kind, the Doctor and the Ponds must find an escape route. But with Amy and Rory’s relationship in meltdown, and an army of mad Daleks closing in, it is up to the Doctor to save their lives, as well as the Pond’s marriage. “Asylum of the Daleks” premieres Saturday, September 1, 9:00 p.m. ET.
“Dinosaurs on a Spaceship” – Episode 2
An unmanned spaceship hurtles towards certain destruction – unless the Doctor can save it, and its impossible cargo…… of dinosaurs. By his side a ragtag gang of adventurers; a big game hunter, an Egyptian Queen and a surprised member of the Pond family. But little does the Doctor know there is someone else onboard who will stop at nothing to keep hold of his precious, prehistoric cargo. “Dinosaurs on a Spaceship” premieres Saturday, September 8, 9:00 p.m. ET.

“A Town Called Mercy” – Episode 3
The Doctor gets a Stetson (and a gun), and finds himself the reluctant Sheriff of a Western town under siege by a relentless cyborg, who goes by the name of, the Gunslinger. But who is he and what does he want? The answer seems to lie with the mysterious, Kahler-Jex, an alien doctor (yes another one) whose initial appearance is hiding a dark secret. “A Town Called Mercy” premieres Saturday, September 15, 9:00 p.m. ET.