BBC Four HD

Programmes start at 7.00pm.

Fred Dibnah tours Britain's great building feats. In Chatham he visits one of the UK's oldest dockyards, while in Leeds he discovers an early form of fireproofing.

Dragons' Den entrepreneur Sara Davies talks about life, wellbeing and business, and absorbs the serenity of the Yorkshire countryside while walking with a 360-degree camera.

Sitcom. Whilst Hyacinth lectures the milkman, she spies a man in Liz's house. She misunderstands the situation and devises a plan involving Richard to flush him out.

Sitcom about a middle-aged man living with his parents. Timothy wants to go to the cinema, but his mother wants him to spend his evenings painting.

Simon Schama continues his look at British history with the greatest horror of medieval Britain - the Black Death.

This intimate and pioneering film explores a three-way relationship and a radically different approach to fatherhood. Contains some strong language.

Uninterrupted and unspoiled by voiceover or music, the birdsong of sunrise in all its glory. Three different habitats, Britain's woodland, heathland and parkland, burst into song.

Fred Dibnah tours Britain's great building feats. In Chatham he visits one of the UK's oldest dockyards, while in Leeds he discovers an early form of fireproofing.

Dragons' Den entrepreneur Sara Davies talks about life, wellbeing and business, and absorbs the serenity of the Yorkshire countryside while walking with a 360-degree camera.

This intimate and pioneering film explores a three-way relationship and a radically different approach to fatherhood. Contains some strong language.

Margaret Mountford uncovers a new story within one of history's most iconic moments.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Fred Dibnah looks at some of the great achievements in civil engineering, from the earliest wrought iron suspension bridge to the Channel Tunnel.

Comedian and actor Nina Wadia enjoys an invigorating spring walk in the Yorkshire Dales. A 360-degree camera captures her thoughts and emotions along the way.

A professor develops an extraordinary relationship with an octopus when he invites it to live in his home to learn about its intelligence.

Documentary following the work of scientists at archaeological marvel the Chauvet cave.

Egg takes his work worries to a therapist but finds that football is the only way forward. Contains some strong language.

Warren fears that Kira might 'out' him to the rest of the family, Anna tries her hand at marriage guidance, and Miles beats his father at his own game. Contains some strong language.

Gabriel Weston looks at the difficulty of identifying the body in a murder case. Contains some scenes which some viewers may find upsetting.