TV tonight: a special 100th birthday party for David Attenborough

100 Years on Planet Earth comes live and direct from London’s Royal Albert Hall. Plus, the final season of Hacks is still a total hoot. Here’s what to watch this evening 8.30pm, BBC OneHappy 100th birthday to David Attenborough! A week of celebratory programming has led up to this special live extravaganza at the Royal Albert Hall in London. The BBC Concert Orchestra will accompany the 90-minute journey through the veteran broadcaster’s most remarkable moments over the last century. Prepare to be left in awe – and probably a wee bit emotional, too. Hollie Richardson 7.30pm, BBC TwoCan you dig it? This edition of the green-fingered gazette comes from the RHS Malvern spring festival in Worcestershire, with Rachel de Thame and Joe Swift seeking out the show’s horticultural highlights. Elsewhere, there is a flower-pressing masterclass and a pleasingly retro showcase of 1970s houseplant chic. Graeme Virtue 7.30pm, ITV1The father-and-son presenters of Gladiators – the Glad Lads? – continue their latest road trip rolling around Australia. While there is banter aplenty, the overarching theme remains “bonding through adversity” – this week that includes a vertiginous ravine traversal and a