National treasure Sir David Attenborough is 99 years young, and still remarkably productive for his age. Just months after his latest documentary Ocean hit big screens up and down the country, he has returned to narrate Parenthood. Filmed over three years across six continents and 23 countries, it is one of the most ambitious nature documentary series ever produced, and “showcases astonishing, never-before-seen animal behaviours in stunning 6K ultra high definition”, per the BBC.