TV tonight: Johnny Vegas helms a whodunnit

Murder, They Hope

9pm, Gold

Johnny Vegas and Sian Gibson reprise their comedy whodunnit series for a new batch of episodes. Following their disastrous trip to Middlesbrough, Gemma (Gibson) and Terry (Vegas) decide to quit their coach trip company and become private investigators instead, expecting the cases to roll in. When they find themselves with no new clients, they hole up at Gemma’s sister’s place and then stumble on the possession of an item coveted by the murderous Bunnyman, who soon comes calling… Ammar Kalia

The Great Garden Revolution

8pm, Channel 4

Our trio of gardening experts are celebrating wild gardens this week. They set about transforming the Barnes family’s garden overlooking the Saddleworth countryside in the Pennine hills to incorporate more of its wild side, while Joel makes a living tipi for the kids to play in. AK

Age of the Big Cats

8pm, Sky Nature

This new series looks at the historical origins of predatory big cats and explores how different species have evolved certain traits to survive. Lions hog the spotlight next time but this opening episode offers close-up encounters with spry cheetahs, crag-hopping snow leopards and a brutally efficient jaguars. Graeme Virtue

Casualty

8.40pm, BBC One

A Casualty double bill revs into action with a cold open for the ages. This time, the person ominously engaged in a death-defying act (motorcross racing) and certain to soon require medical attention, is Holby City’s paramedic, Lev. In the second episode, Jade’s revenge plot on a drink-spiker goes dangerously awry. Ellen E Jones

Muhammad Ali: A Life in Ten Pictures

9pm, BBC Two

Ali was one of the most photographed – and photogenic – sportspeople of all time. Indeed, picking just 10 defining images may well have been a challenge. Expect explanations of familiar and epoch-defining snaps from his boxing career and a few images from his personal life too. Phil Harrison

Blinded: Those Who Kill

9.30pm, BBC Four

A sequel to the Danish thriller Darkness: Those Who Kill, this eight-part season once again follows criminal profiler Louise (Natalie Madueño). A phone call from a dying family friend causes Louise to look into the cold case of her son’s death, and when a similar murder surfaces, the hunt for a serial killer begins. AK

Film choice

When We Were Kings, 10pm, BBC Two

Leon Gast’s doc details Muhammad Ali’s part in one of the greatest ever boxing contests, against George Foreman in Zaire, 1974. With commentaries from Norman Mailer and George Plimpton, it follows the training, the press conferences, the Don King promotional gambits, and the brutal majesty of the fight itself. Paul Howlett

Live sport

Rugby League: Hull FC v Wigan 2pm, BBC Two. Followed by Castleford Tigers v Salford Red Devils at 5.10pm.

Premier League Football: Sheffield United v Crystal Palace 2.45pm, Sky Sports Main Event. Manchester City v Chelsea at 5pm, Liverpool v Southampton at 7.45pm.

Rugby Union: Bath v Bristol Bears 4.15pm, BT Sport 2. Gallagher Premiership match.