David Attenborough's 100th birthday is celebrated with a special live broadcast titled '100 Years on Planet Earth' tonight at 8.30pm on BBC One. The 90-minute show from London's Royal Albert Hall features the BBC Concert Orchestra accompanying a journey through the broadcaster's most remarkable moments over the past century.
Other highlights include 'Gardeners' World' at 7.30pm on BBC Two from the RHS Malvern spring festival, and 'Gladiators' at 7.30pm on ITV1, where father-and-son presenters continue their Australian road trip with challenges including a ravine traversal and sheep-shearing.
The final season of 'Hacks' airs on Sky Atlantic at 9pm, with a double bill featuring Deborah being courted by an AI startup and mistaken for a couple with Ava. 'St. Denis Medical' on BBC One at 10.40pm offers a farcical episode about secrets, while 'The Chris Evans Show' on Channel 4 at 11.05pm continues its freewheeling format.
Film highlight 'Downton Abbey: The Grand Finale' screens on Sky Cinema Premiere, focusing on Lady Mary's divorce scandal in 1930. Sports coverage includes the Giro d'Italia cycling from Bulgaria on TNT Sports 3 and Premiership Rugby Union match Gloucester v Sale on TNT Sports 1.
