BBC Four Wednesday

Dublin-born social historian Emma Dabiri uses artworks held in the Ulster Museum in Belfast to explore a different way of seeing the world - through the eyes of artists

Robbie Cumming has problems with ice on the Grand Union Canal, and ends his journey in Braunston, Northamptonshire, the spiritual home for narrowboaters

Mathematician Marcus du Sautoy demystifies the hidden world of algorithms, which have secretly taken over the modern world, running everything from search engines to satnavs

Chris Packham introduces a documentary from the BBC archive that takes a look at the worst British winter of the 20th-century, and also explores how it affected wildlife

Emma Thompson and Paul Murton take a look back at the 1995 TV drama, The Blue Boy, while discussing their shared childhood summers in Scotland and their love of ghost stories

A couple expecting their first baby spend time in the Highlands, hoping for a fresh start. Drama, starring Emma Thompson and Adrian Dunbar

A middle-aged schoolteacher takes one of her former pupils as her second husband, but comes to believe he might be a killer. Drama, starring Billie Whitelaw and Iain Glen

Chris Packham introduces a documentary from the BBC archive that takes a look at the worst British winter of the 20th-century, and also explores how it affected wildlife

Robbie Cumming has problems with ice on the Grand Union Canal, and ends his journey in Braunston, Northamptonshire, the spiritual home for narrowboaters

Mathematician Marcus du Sautoy demystifies the hidden world of algorithms, which have secretly taken over the modern world, running everything from search engines to satnavs