BBC Four HD

Programmes start at 7.00pm.

Post-war architectural innovations in the Big Apple.

Kenneth Williams stands in for Terry Wogan, chatting with guests Barbara Windsor and husband Steve Hollings, Stephen Fry and Michael Palin. Music by Hank Marvin & The Shadows.

Documentary exploring Britain's funniest and most complex comic performer. Deals with adult themes.

Kenneth Williams explores his roots in and around London's St Pancras, where he grew up.

Documentary following undercover police as they investigate online crime against children. Contains some strong language and disturbing scenes.

A Storyville documentary that follows a Russian schoolteacher as he risks everything to expose rising militarism in his classroom. Contains some strong language.

Documentary exploring Britain's funniest and most complex comic performer. Deals with adult themes.

The story of how our solar system will be transformed by the ageing sun before coming to a spectacular end in about eight billion years.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Michael finds out about the impact of a famous Enoch Powell speech across the nation.

Rugby legend Gareth Edwards and wife Maureen try steam trains and rallying in Machynlleth.

Brian explores the enigma of time - a phenomenon that we take for granted but which, as far as physicists are concerned, is one of the biggest mysteries in the universe.

Bruce Parry spends time with the Akie people of Tanzania, who live on the savannah. Contains some strong language.

Sir Derek Jacobi looks back on the 1997 BBC drama about mathematician Alan Turing.

Factual drama about Alan Turing, the mathematical genius who cracked the Enigma code. Deals with adult themes.

Sam Willis tells the story of the English ruler who left the most indelible mark on the castle, Edward I, as he turned it into an instrument of colonisation.

Michael finds out about the impact of a famous Enoch Powell speech across the nation.

Rugby legend Gareth Edwards and wife Maureen try steam trains and rallying in Machynlleth.

Bruce Parry spends time with the Akie people of Tanzania, who live on the savannah. Contains some strong language.

Brian explores one of the greatest mysteries in physics today - what is time.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Michael visits the fairy-tale castle of Eastnor at the foot of the Malvern Hills, before heading to the Severn Estuary and Filton, the centre of Britain's postwar aviation industry.

The Edwards mark their 49th wedding anniversary in the picturesque seaside town of Tenby.

Dr Helen Czerski looks at volcanoes. New thermal imagery and ultra high-speed photography capture the complex processes crucial to understanding how and why they erupt.

Celia Imrie tells the story behind one of the most groundbreaking and influential films of the sixties, 1967's Bonnie and Clyde, starring Warren Beatty and Faye Dunaway.

Clyde Barrow and Bonnie Parker achieve growing notoriety as they carry out a series of robberies with their gang in 1930s America. Contains some violent scenes.

Timewatch goes in search of the true story of Bonnie and Clyde, with unprecedented access to gang members' memoirs, family archives and police records.

Margy Kinmonth meets millionaire customers and world-famous designers as she explores the anachronistic but little-explained pocket of the fashion industry known as haute couture.