Time Heist

In Clara's flat, the Twelfth Doctor answers the TARDIS's phone; both are surprised to find themselves in a room with two others: Psi, a hacker with an augmented brain, and Saibra, a mutant shapeshifter.

A recording includes messages from each agreeing to a short-term memory wipe, before getting instructions from the Architect to break into the Bank of Karabraxos and steal three items from its vault.

The head of bank security Ms. Delphox uses a telepathic alien called the Teller to detect those with criminal intent and destroy their brains; the Doctor believes the memory wipes were needed to avoid being caught.

Within, the Doctor, Clara, Saibra, and Psi find six devices left by the Architect that appear to be atomic shredders, to be used if they are caught to die quickly and painlessly.

The door appears impossible to open, but then a solar storm strikes the planet's surface, triggering an automatic unlocking sequence; the Doctor realises this was a "time travel heist".

[1] When Psi tries to lure the Teller away from Clara by visualising some of the galaxy's most notorious criminals, the mugshots he is seen accessing include a Sensorite (from the 1964 serial The Sensorites), a Terileptil (from the 1982 serial The Visitation), a Slitheen, an Ice Warrior, the Gunslinger from "A Town Called Mercy", Captain John Hart from Torchwood, Androvax and the Trickster from The Sarah Jane Adventures, and Abslom Daak from Doctor Who Magazine.

[1][4] Filming continued at the Hadyn Ellis Building, part of Cardiff University, on 18 March 2014,[5][6] and at the nearby Bute Park the next day.

Ben Lawrence, writing in The Daily Telegraph, noted that "in a show that is sometimes rather burdened by the need to maintain clever story arcs, Time Heist was a standalone episode that allowed some breathing space.

[23] Writing for SFX, Nick Setchfield praised director Douglas Mackinnon's "visual flair", but felt the episode as a whole was "solid, mid-tier Who but... not the smooth criminal it could have been.

Mulkern did, however, praise the performances of Jenna Coleman and Peter Capaldi, described as "the right man for the job but doesn’t always get the material he deserves.