BBC Four HD SkyTV

Programmes start at 7.00pm. [HD]

Will Millard explores some of Wales's hidden historic buildings, meeting the passionate individuals who are trying to save these vulnerable structures before it is too late. [S] [HD]

1/5. The inside story of the design and construction of the Severn Bridge. [S,AD] [HD]

1/6. DI Ffion Lloyd returns home to lead a murder investigation with disturbing echoes. Contains some strong language. [S,AD] [HD]

2/6. A chase ends with an arrest - but is the real killer still out there? Contains some strong language. [S,AD] [HD]

2/6. Michael Parkinson looks back at his 1974 interview with Richard Burton. Parkinson persuaded him to talk candidly about his career, love life and drink problems. [S]

2/4. Aled Jones presents the funny, warm and moving life story of comedian and singer Harry Secombe, a down-to-earth Swansea lad who became one of the nation's best-loved entertainers. [S]

5/6. As hotel porter, Fletch recognises an unscrupulous guest, Worm Wellings, and suspects he may be planning an insurance scam. [S]

6/7. Classic comedy with the rag-and-bone team. When the arguments become just too much for Harold, he decides to take drastic measures to get some peace from Albert. [S]

In a programme that first aired in 1967, actor Harry H Corbett talks to Clive Goodwin about his start in the profession, the parts that brought him success and his views on acting. [S]

Will Millard explores some of Wales's hidden historic buildings, meeting the passionate individuals who are trying to save these vulnerable structures before it is too late. [S] [HD]

1/5. The inside story of the design and construction of the Severn Bridge. [S,AD] [HD]

Programmes start at 7.00pm. [HD]

Programmes start at 7.00pm. [HD]

...Secrets of Cinema Special. Is there a trick to making an Oscar-winning film? [S,AD] [HD]

4/6. Bruce Parry reaches the halfway point of his journey in the nature reserve of Mamiraua, home to the Amazon's most iconic species. He lives with the Ribeirinho, the river people. [S,AD]

Folk group Calan and the BBC National Orchestra of Wales deliver a stunning performance of their unique take on traditional Welsh folk music for St David's Day. [S] [HD]

Huw Stephens presents highlights from the Other Voices festival in Cardigan, including Manic Street Preachers frontman James Dean Bradfield. [S] [HD]

A recreation of chief Proms conductor's Malcolm Sargent's 500th Prom from 1966. Featuring works by Schumann, Berlioz, Elgar, Holst and Britten. [S] [HD]

Nile Rodgers, composer, producer, guitarist and founding member of Chic, talks to John Wilson about his cultural influences. [S] [HD]

2/6. Michael Parkinson looks back at his 1974 interview with Richard Burton. Parkinson persuaded him to talk candidly about his career, love life and drink problems. [S]

4/6. Bruce Parry visits the vast nature reserve of Mamiraua. Contains some scenes which some viewers may find upsetting. [S,AD,SL]

Programmes start at 7.00pm. [HD]

Programmes start at 7.00pm. [HD]

5/15. Dr Jonathan Foyle's quest to scale Britain's most iconic structures takes him to Layer Marney Tower, a Tudor skyscraper nestled in the countryside near Colchester in Essex. [S,AD] [HD]

Actress America Ferrera searches for a connection to the father she barely knew and discovers a great-grandfather who left an enduring mark on Honduran history. [S,AD] [HD]

2/3. Simon Schama explores how the romantics became the first explorers of the unconscious. [S,AD] [HD]

3/3. Alan Yentob tells the story of the most famous work of art in the world - the Mona Lisa. He discovers who she is, and why she is smiling. [S,AD]

Documentary about 60s pop artist Pauline Boty, tracking her contribution to British art. [S,AD] [HD]

Ken Russell's 1962 film on the young British artists who were pioneering the pop art movement. Featuring Peter Blake, Peter Phillips, Derek Boshier and Pauline Boty. [S]

Celebrating Lee Miller, a model turned photographer turned war reporter. Contains scenes which some viewers may find disturbing. [S,AD] [HD]