WEB POLICE

The Internet’s Dirtiest Secrets: The Cleaners — Storyville, 9pm, BBC4

SOCIAL media can connect people in ways that were unimaginable 25 years ago, but the cost of this free expression — materials promoting terrorism, child abuse, self-harm — is high. This stark, timely new documentary meets some of the people employed to censor such material in the Philippines, and learns of the cost to them of having to look at it.