The following review contains major spoilers, so please don't read unless you've seen the episode in question, or spent 1999 screaming "Bruce Willis is a ghost!" in shopping malls...

This week, we were introduced to a young woman called Victoria (Lenora Crichlow) who wakes up in an empty house with a terrible headache, sat in a chair with open wrist-restraints and a bottle of pills spilled on the floor. There's a television displaying a white logo, and it soon becomes apparent Victoria doesn't know who and where she is. Venturing outside, she's puzzled to find that the neighbours all keep their distance, never speak, and all keep their mobiles phones trained on her—recording her every move, and following her around like crazy voyeurs. She later meets a young woman called Jem (Tuppence Middleton), who reveals most of the population have been transformed into mute onlookers by a dangerous signal that suddenly appeared on every screen—which has led to a bizarre situation where some of the unaffected have taken the opportunity to indulge their sick desires, as both woman soon become the prey of a group of masked weirdo "hunters"...

It obviously requires a big imaginative leap to accept ordinary people would participate in this kind of event—but that's actually part of the nightmare. They don't have to make sense. Brooker is instead capturing that sense of outrage the public get whenever a notorious murderer is captured, and either disappears behind bars (at best) or perhaps commits suicide to escape justice. In this fantasy scenario, punishment is elaborate, industrial, severe and relentless... but also shows the innocent people as equally as callous in some ways. A little nod at the trend for people to surreptitiously enjoy watching people suffer, somewhat protected from the "barrier" that exists when you're watching a screen.
Lenora Crichlow does surprisingly well as the lead here, given how I wasn't a fan of her performance as the ghost Annie in four series of Being Human—even if it's largely a role where she pinballs between confusion, terror and disbelief. She was nevertheless very good and kept you invested in the poor woman's plight—even keeping your sympathy when it became clear how despicable a person she really is. The supporting cast were less memorable in smaller roles, with the exception of Kill List's Michael Smiley as the orchestrator of the whole White Bear experience. There's something very scary about a man who's so jovial and matter-of-fact about a job that entails scaring someone half to death every single day... for the twisted pleasure of people who think this is an acceptable form of punishment.
I can understand people preferring last week's "Be Right Back" because it contained better acting and emotional nuances, but I think "White Bear" was significantly cleverer and edgier. You might not like how it resolved (twist-endings rarely please everyone), and the footage show amidst the end credits perhaps over explained what has been going, but otherwise this was a gloriously weird, frightening and gonzo hour of bleak entertainment.
written by Charlie Brooker / directed by Carl Tibbetts / 18 February 2013 / Channel 4