TV Guide U&Yesterday Thursday

In 1930, recovering from a personal crisis, Agatha Christie fell in love with and married Max Mallowan. This relationship, and the security it brought, saw Agatha enter the most prolific and successful chapter of her career. This would be the period in which Agatha penned some of her most famous and enduring bestsellers, including Murder on the Orient Express. Lucy follows in Agatha's footsteps to discover the roots of these works and explores how, in later life, Agatha achieved global celebrity - but remained very much the anonymous observer, hiding in plain sight

Michael Portillo ventures deep underground onto London's newest railway - the Elizabeth Line - enjoying a smooth ride from Paddington to Tottenham Court Road. Emerging into the sunshine in Bedford Square, Michael recalls the choking smogs which plagued the capital during the 1950s. He learns how smoke-free zones were introduced to tackle the problem and, high above the capital at the top of the BT Tower, discovers how the capital's air quality is monitored today

Michael Portillo begins the latest leg on the seafront at Felixstowe, where in January 1953 the town was engulfed in the worst flooding to hit England in the 20th century. In Norwich, he admires the Norman Cathedral, then traces the history of the postcode

At RAF Lakenheath, Michael Portillo discovers a slice of America dropped into the British countryside. In the market town of Brandon on the border between Norfolk and Suffolk, he visits Quorn Foods to find how a seemingly modern meat substitute emerged out of a post-war food crisis. Michael ends his journey in Cambridge, where he studied during the 1970s

Michael Portillo begins a journey from the Midlands to the West Country, beginning in Derby, where he visits the city's famous 19th-century railway works. In Leicester he looks back to the early 1970s, when around 10,000 Asians arrived in the city after being expelled from Uganda by the dictator Idi Amin. He also hears how meat rationing during the Second World War led to the birth of Walkers crisps, still produced in the city

Factors influencing America's decision to support Britain during the Second World War, and how Hitler's declaration of war on the US convinced Congress to take more decisive action. Narrated by Laurence Olivier

Fiona Bruce presents the show from the grounds of Belmont House in Kent, where she encounters a disguised Michael McIntyre preparing a prank for his Saturday night show. Items brought in to be valued include an early David Hockney painting, a trophy awarded to Take That in 1995, a sword that once belonged to a member of the Dervish religious order, and a telegram announcing the end of the Second World War

Fiona Bruce presents the show from Clissold Park in Stoke Newington. Treasures include a collection of ancient Peruvian pottery, with some pieces made over a thousand years ago, an archive of textile designs by pioneering post-war designer Althea McNish, and Harold Wilson's pipe. Ceramics expert Serhat Ahmet challenges Fiona to work out what she should buy, sell or keep from a selection of figures by the Meissen factory

Factors influencing America's decision to support Britain during the Second World War, and how Hitler's declaration of war on the US convinced Congress to take more decisive action. Narrated by Laurence Olivier

Lucy explores how American history has been mythologised and manipulated by generations of politicians, writers and protesters. She begins by examining the American Revolution - a David-and-Goliath battle of men with high ideals taking on the might of the British Empire. But how much of America's founding story is based on fact?