TV tonight: Boris Johnson and Jeremy Corbyn go head to head

Ammar Kalia, Graeme Virtue, Ellen E Jones, Hannah Verdier and Paul Howlett
Photograph: Facundo Arrizabalaga/EPA

The BBC Prime Ministerial Debate
8.30pm, BBC One

With the general election fast approaching, Boris Johnson and Jeremy Corbyn debate each other in front of a forum in Southampton chaired by ex-BBC political editor Nick Robinson for perhaps the last time before the public goes to the polls. With the opinion still fluctuating, TV interviews like this could make all the difference for the nation’s many undecided voters. Ammar Kalia

China’s Vision of the Future
7pm, National Geographic

With a population of 1.4 billion people, China is one of the world’s largest polluters. After generations of oil-fuelled expansion, the Chinese are now exploring new green ways to sustain their megacities, such as the vertical forests and wind farms explored in this insightful documentary. AK

Unreported World
7.30pm, Channel 4

Krishnan Guru-Murthy, at his day job on Channel 4 News. Photograph: Sophia Evans/The Observer

Krishnan Guru-Murthy travels to some of the most turbulent regions of Mali to learn first-hand about the power struggles between raiding jihadists and local bands of hunters. So far, the collateral damage has included historic sites and irreplaceable manuscripts, particularly in the city of Timbuktu. Graeme Virtue

Mountain Vets
8pm, BBC Two

The mountain vets in the kingdom of Mourne continue their noble quest to rescue inaccessible animals in need. This week, Rachel gets embroiled in an emergency operation on a cow with a life-threatening displaced stomach, while Martin operates to save a young sheepdog’s injured leg. It is tense work for our medical heroes in an area where animals outnumber people 10 to one. AK

The Name of the Rose
9pm, BBC Two

John Turturro’s labour-of-love adaptation of Umberto Eco’s intellectual murder mystery reaches its penultimate episode, so perhaps you can tell the monks apart by now? A daisy chain of confessions leads William (Turturro) closer to the truth, while Adso defends the Occitan girl accused of witchcraft. Ellen E Jones

Country Music By Ken Burns
9.30pm, BBC Four

Burns’s far-reaching examination of country reaches the mid-60s, when ex-jailbird Merle Haggard became the genre’s poet and Johnny Cash’s Folsom Prison gig propelled him to superstardom. The second helping edges into the 70s with the Vietnam war and Kris Kristofferson. Hannah Verdier

Film choice

Calvary (John Michael McDonagh, 2014), 12.05am, BBC Two
In the confession box, an anonymous parishioner talks of terrible childhood abuse and tells Brendon Gleeson’s decent Sligo priest, Father James, that he will be the randomly chosen victim of his revenge, to be killed in seven days. A fierce examination of faith from John Michael McDonagh. Paul Howlett

Live sport

Golf: Australian Open 7pm, BT Sport 2. Coverage of day two from the Australian Golf Club in Sydney.

Heineken Champions Cup rugby union: Bath v Clermont 7pm, BT Sport 2. Live rugby from the Recreation Ground.

Championship football: Millwall v Nottingham Forest 7pm, Sky Sports Main Event. The Den hosts second-tier action.