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.

The latest episode of Doctor Who tips its hat to the show's fandom by having the Doctor break the fourth wall in a rather literal sense.