4/5. How the orang-utan has become the world's largest tree-dwelling animal.

Steed tackles a scientist's devious deputy. Guest-starring Nicholas (the Brigadier from Doctor Who) Courtney.

2/6.
Fabrice Callet dreams of becoming one of the palace's elite band of guides.

New. Huw Edwards
tells the story of the revolt in Wales 600 years ago led by Owain Glyndwr that shook the foundations of the British state.
First shown on BBC1 Wales

4/4. The group is shocked by the recent loss, but continue into buffalo territory.

Time
Shift looks at how Dan Brown's thriller has forced a counterattack from the Church, the art world and academics. See Monday's choice.