Programación de BBC Four

3/6. Ben Garrod finds out how the skeleton has allowed vertebrates to take to the air, why the pigeon is an exceptional flier and how the albatross makes huge migrations. [S] [HD]

Nostalgic look back at City Lights, the sitcom that captured the spirit of 1980s Scotland. Contains some strong language. [S,AD] [HD]

1/3. Isolated since the time of the dinosaurs, New Zealand's wildlife has been left to its own devices. Its forests are stalked by predators from the Jurassic era. [S,AD,SL] [HD]

Programmes start at 7.00pm. [HD]

Programmes start at 7.00pm. [HD]

4/6. Ben Garrod delves into the surprising ways in which bone has evolved to help vertebrates sense the world around them, from wolves and sheep to the great grey owl. [S] [HD]

4/4. Timothy and his wife Shane encounter several Scottish ports and islands in the misty drizzle, and venture up the Caledonian Canal. [S,AD]

Film exploring one of the most important archaeological discoveries of our time - an ancient city in Sichuan, China, lost to time until the chance unearthing of a jade object in 1927. [S] [HD]

1/5. The rocky planets Mercury, Venus, Earth, and Mars were born at the same time from the same material, yet they have lived radically different lives. What immense forces are at play? [S,AD] [HD]

Dame Janet Suzman shares her memories of making The Singing Detective, the groundbreaking Dennis Potter drama which is widely regarded as a landmark television moment. [S] [HD]

2/6. Marlow faces his personal misery of the talking cure with the psychologist. Contains some scenes of a sexual nature. [S]

4/6. Ben Garrod delves into the surprising ways in which bone has evolved to help vertebrates sense the world around them, from wolves and sheep to the great grey owl. [S] [HD]