BBC four

Dr Helen Czerski looks at the anatomy of an avalanche. From shocking eyewitness footage from within an avalanche to detailed CT scans showing the microscopic changes that cause them, we can now capture exactly what happens as snow transforms into a deadly and unpredictable danger.

Archaeologist Ben Robinson unlocks the ancient roots of the Northumberland village of Warkworth. With the help of locals, he discovers clues that point back almost 1,000 years to the Norman conquest when the invaders laid the foundations of a planned community, still visible to this day.

Comedy. Detained at Her Majesty's pleasure, cellmates Fletcher and Godber become unwilling accomplices to an escape attempt in this cinema version of the popular BBC comedy.

Pittsburgh English Professor Grady Tripp cannot finish his latest novel. Nor can he handle his wife leaving, his girlfriend's pregnancy announcement, the arrival of his editor or a strange talented student seeking mentorship. All in the same week.

Terry Wogan in conversation with Michael Douglas, Glen Campbell, Jean Muir and Tom Hulce.

Soprano Joan Sutherland talks to Bernard Levin and sings scenes from some of her most celebrated roles. With the Royal Philharmonic Orchestra, led by Erich Gruenberg and conducted by Richard Bonynge.

The famous Australian opera singer, introduced and accompanied by Gerald Moore.

Dr Helen Czerski looks at the anatomy of an avalanche. From shocking eyewitness footage from within an avalanche to detailed CT scans showing the microscopic changes that cause them, we can now capture exactly what happens as snow transforms into a deadly and unpredictable danger.

Archaeologist Ben Robinson unlocks the ancient roots of the Northumberland village of Warkworth. With the help of locals, he discovers clues that point back almost 1,000 years to the Norman conquest when the invaders laid the foundations of a planned community, still visible to this day.

It is possible that only one per cent of the wonders of ancient Egypt have been discovered, but now, thanks to a pioneering approach to archaeology, that is about to change. Dr Sarah Parcak uses satellites to probe beneath the sands, where she has found cities, temples and pyramids. Now, with Dallas Campbell and Liz Bonnin, she heads to Egypt to discover if these magnificent buildings are really t

Jo Whiley presents the pop chart programme, first broadcast on 7 March 1997 and featuring Erasure, The Bee Gees, Peter Andre, Beck, Babyface, Aerosmith, No Doubt and Spice Girls.

Ian Broudie presents the pop chart programme, first broadcast on 14 March 1997 and featuring Ant & Dec, Kula Shaker, 3 Colours Red, Sash!, Alisha's Attic, No Mercy, Dodgy, Spice Girls and Fugees.

Gary Davies and Janice Long present the pop chart programme, first broadcast on 30 January 1986 and featuring Billy Ocean, Madonna, Talk Talk, James Brown, Simple Minds, Grace Jones, Fine Young Cannibals and a-ha.

Bruno Brookes presents the pop chart programme, first broadcast on 2 February 1990 and featuring Sybil, Sinead O'Connor and The House of Love.

As ABBA mark 50 years since winning the 1974 Eurovision Song Contest, it's time to take another voyage into the archives for more of the Swedish supergroup's best BBC moments. As well as looking back, this collection brings things right up to date, capturing the excitement and sounds of their recent, technologically pioneering stage shows. Sitting alongside the new material are plenty of classics

Using previously unheard interviews with the band, this is the story of the Swedish super group's 50-year relationship with the UK. From their first visit, for the Eurovision Song Contest in Brighton in April 1974, to their first ever UK concert in Birmingham in 1977, to the groundbreaking ABBA Voyage concerts in London – this documentary looks at Britain's impact on the band and the legacy they h

ABBA star in their first European TV special, recorded on location in the Swiss Alps. Also featuring special guests Kate Bush and Roxy Music.

Jo Whiley presents the pop chart programme, first broadcast on 7 March 1997 and featuring Erasure, The Bee Gees, Peter Andre, Beck, Babyface, Aerosmith, No Doubt and Spice Girls.

Ian Broudie presents the pop chart programme, first broadcast on 14 March 1997 and featuring Ant & Dec, Kula Shaker, 3 Colours Red, Sash!, Alisha's Attic, No Mercy, Dodgy, Spice Girls and Fugees.

Gary Davies and Janice Long present the pop chart programme, first broadcast on 30 January 1986 and featuring Billy Ocean, Madonna, Talk Talk, James Brown, Simple Minds, Grace Jones, Fine Young Cannibals and a-ha.

Bruno Brookes presents the pop chart programme, first broadcast on 2 February 1990 and featuring Sybil, Sinead O'Connor and The House of Love.

As ABBA mark 50 years since winning the 1974 Eurovision Song Contest, it's time to take another voyage into the archives for more of the Swedish supergroup's best BBC moments. As well as looking back, this collection brings things right up to date, capturing the excitement and sounds of their recent, technologically pioneering stage shows. Sitting alongside the new material are plenty of classics

Seamus Heaney travels across Lough Erne in Fermanagh.

Mr Wilkinson's colt defeats both James's and Tristan's attempts at treatment. For Siegfried, however, the mammoth task is completed by use of a little guile and wisdom.

Farmer Ogilvie's bull refuses to have anything to do with his cows. Meanwhile, Tristan is put into a tricky situation.

While Wisting is recovering from an accident, someone leaves him an anonymous note about an unsolved disappearance and a potential miscarriage of justice. Unsure who on the force he can trust, Wisting starts investigating it in secret.

Another anonymous tip takes Wisting deeper into the murky unsolved disappearance.

Terry Wogan in conversation with David Jason, Jennifer d'Abo and Rock Hudson.

Written by Tony Jordan, this is the heartwarming story of Dame Barbara Windsor, the Cockney kid with a dazzling smile and talent to match. Preparing to perform in the theatre one cold evening in 1993, the cheeky, chirpy blonde Babs recounts the people and events that have shaped her life and career over 50 years from 1943 to 1993. She contemplates her lonely childhood and Second World War evacuati