This episode, Jason and Paul do their futuristic shopping with "Kerblam!"  The 13th Doctor and the TARDIS crew are summoned to the mega retailer by a cry for help.  Only to find an even bigger mystery than they expected.  While wading through aisles of automation, the Doctor finds that the culprits are not exactly who they seem.  Suggestive sell, creepy robots, and a twist you didn't see coming make KERBLAM an interesting encounter!