Other TV shows may break the fourth wall by talking directly to the audience. Doctor Who just blew it to smithereens — and it's been a long time coming.

As well as being a great visual, it's a handy metaphor for the show's newfound disregard for the so-called fourth wall — in the modern Whoniverse, fictional characters acknowledging their audience is becoming increasingly standard.

This review contains full spoilers for Doctor Who Season 2, Episode 2, “Lux”. Following a disappointing season premiere, this week’s Doctor Who is a meticulously crafted descent into a retro-tinged nightmare,