With The TARDIS getting ever smaller on the outside, Clara must Doc up and investigate a case of killer graffiti
The Doctor is doing his best to get Clara back to the exact right time and place whence he last plucked her because her boyfriend is famously flexible and there are definitely no fishy fibs being floated. But they find themselves in Bristol instead, so, right time and right place-ish, but the TARDIS is somewhat dimensionally challenged.
People have been going missing under strange circumstances, and something alien is certainly afoot. With the Doctor stuck in the TARDIS, and the trusty blue box gradually shrinking to handbag-size, Clara takes the reins and literally impersonates the Doctor.
With her own Watson by her side in the form of loveable local graffiti artist Rigsy, and with the Doctor in her ear, Clara must inspect the clues from every angle, and dimension. There are two sides to every story and Clara has her work cut out to get to the why of this axis of evil and find out where the real threat lies.