The latest national and international news, exploring the day's events from a global perspective.

Iolo Williams explores Snowdonia. He starts his journey during spring in Nant Ffrancon in the Ogwen Valley and discovers a relic of a past landscape in Bird Rock. Show more

Dominic Sandbrook continues his exploration of science fiction by looking at its obsession with alien invasion, from all-out assault to sinister hidden threats. Show more

Dan Snow uncovers the lost Vikings in America with Dr Sarah Parcak. As Sarah searches for Vikings across the Atlantic, Dan explores their journey 500 years before Columbus. Show more

Lars Tharp appeals to the nation to help him recover a rare piece of long-lost William Hogarth memorabilia - a precious terracotta sculpture of the artist's beloved pet pug. Show more

Series looking at the history of 20th-century farming in Britain. This episode features the stories of two dairy farmers who survived the supermarket revolution. Show more

Series exploring four ships built on the river Clyde. David Hayman tells the story of CS Mackay-Bennett, a cable repair ship launched in 1884. Show more

Timeshift takes a loving and sometimes horrified look back at the iconic hairdos and 'must have' haircuts that both men and women in Britain have flirted with in the past 60 years. Show more

Dan Snow uncovers the lost Vikings in America with Dr Sarah Parcak. As Sarah searches for Vikings across the Atlantic, Dan explores their journey 500 years before Columbus. Show more