George III – The Genius of the Mad King (BBC2, 9pm)

AFTER 200 years under lock and key, all the personal papers of George III are seeing the light of day for the first time. In this documentary, Robert Hardman uses these documents to shed new light on Britain's longest-reigning king, revealing a man who was a political micro-manager and a restless patron of science and the arts, and someone who was driven – sometimes to distraction – by his sense of duty to his family and his country. Featuring readings by Simon Callow and Sian Thomas who provide the voices of King George and Queen Charlotte.

Undercover: Britain's Cheap Clothes – Channel 4 Dispatches (C4, 8pm)

THE British public have certainly taken internet shopping to their hearts – a few years ago, Black Friday and Cyber Monday were largely unknown concepts in the UK, but this year these pre-Christmas sales days saw us spend almost £6.5billion online. In her continuing investigation into Britain's cheap clothing market, Morland Sanders looks into what the home-delivery economy boom means for the workers in some of the 1,500 warehouses that have sprung up in Britain to service these orders. Secret filming shows the realities of operatives walking miles of floorspace a day to make sure the clothes are dispatched during the busiest time of year and also asks what happens if an employee is unwell, turns up late or doesn't want to work overtime.

On Demand

Annie Mac: Who Killed the Night? (BBC3)

EVEN if your own clubbing days are a distant memory (or you always preferred a quiet drink to a rave-up), you may assume that a new generation is heading out on Friday and Saturday nights, ready to hit Britain's dance floors. However, it seems that's not the case – almost half of the UK's nightclubs have closed down over the past decade. DJ and broadcaster Annie Mac is on a mission to find out why, as she asks whether local councils, the police and property developers have made it harder for clubs to stay open. She also raises the possibility that it's simply down to young people changing their partying habits, as the nation's nightspots find themselves competing with all-day events, illegal raves and the internet.

Black Sails (Amazon Prime Video)

THIS prequel to Robert Louis Stevenson's classic novel Treasure Island has become a firm favourite with viewers, who have been awaiting its fourth series. Well, they will be put out of their misery from this week thanks to the appearance of the first of ten episodes. The bad news is, this is the end of the road for Captain Flint and co – the run marks the adventure's conclusion. Here, our heroes are at war in the West Indies, and the shores of New Providence Island have never been bloodier thanks to a conflict between 'civilised' colonists and the pirates. Once again Toby Stephens heads the cast as Flint, while Luke Arnold (as John Silver), Hannah New (as Eleanor Guthrie) and Tom Hopper (as Billy Bones) are among the supporting cast.

The Walking Dead (NOW TV/Sky On Demand)

WHEN this series began back in 2010, its makers probably hoped it would find an audience, but probably never imagined that it would become a global phenomenon – after all, it appeared to have a rather niche appeal. However, the story of Rick Grimes and his attempts to keep himself, his loved ones and those around him alive have proved to be gripping – it may have been billed as a zombie horror series, but it's turned out to be rather more human than that. At the moment, the horror drama, which is based on a best-selling comic book series by Robert Kirkman, Tony Moore and Charlie Adlard, is on a mid-season break, but to get viewers up to speed before its imminent return, here's a chance to watch the show from the beginning. Andrew Lincoln, Norman Reedus and Lennie James star.

Viv Hardwick