Casualty

8.50pm, BBC One

“We might be about to re-enter hell.” Holby continues to ramp up the drama with another 12-part series – entitled Lethal Legacy – which this time follows a mysterious illness that might start another potential pandemic. If that doesn’t sound too traumatic, the team have personal demons to face, too. Hollie Richardson

Secret Africa: Into the Wild

7pm, Channel 4

Explorer Lucy Shepherd continues her survivalist trek through some of the remotest parts of Tanzania. She and local guides must reach a resupply point before tackling the Serengeti. Obstacles include curious elephants, killer bees and some unfortunate digestive issues. Graeme Virtue

Black British Music at the BBC: Volume 2

8.50pm, BBC Two

Diamonds are forever … Black British Music at the BBC: Volume 2 on BBC Two.…