TV tonight: the shocking aftermath of a child's killing

Who Killed Garrett Phillips?

9pm, Sky Crime

When the 12-year-old Garrett Phillips was murdered in his home in 2011, police soon homed in on a suspect: Oral “Nick” Hillary, a black man in the mostly white community of upstate New York and the ex-boyfriend of Garrett’s mother. This harrowing two-part doc from Liz Garbus analyses the five-year aftermath and trial of Hillary, while raising important questions of police bias when it comes to race. A worrying insight into the ethics and practices of a small-town justice system. Ammar Kalia

Great Canal Journeys

8pm, Channel 4

Prunella Scales and Timothy West’s travelogue has always had a bittersweet air of valediction, but this seems to be a last cheerio. A nostalgic trip up “the Oxford” is intercut with memories from old episodes and, as Pru’s capabilities dwindle, scenes of Tim mourning the slow loss of his soulmate. Jack Seale

The Mystery of Rome’s Sunken Cities

8pm, Channel 5

After divers discovered the ancient ruins of the Roman city of Neapolis along the Tunisian coast in 2017, this documentary examines the reasons for the once-prosperous city’s sudden disappearance – perhaps due to a gigantic tsunami. It’s an ancient Atlantis of the Roman age. AK

Harry & Meghan: An African Journey

9pm, ITV

Their trip to southern Africa – including unveiling baby Archie to the world – has, naturally, made the headlines. But no reporter had the same access to the Sussexes as ITV’s Tom Bradby, making this doc the ethical way to get your royal updates and to hear from the couple themselves. Hannah J Davies

Night and Day: Walter Presents

11pm, Channel 4

A new series of the noirish Spanish thriller. Judge Carles Vallejo finds a lead with the potential to reveal a vast network of corruption. But, inevitably, discovering this underworld has its risks. Soon, forensic pathologist Sara Grau is picking up the pieces. The full series is available on All4. Phil Harrison

Football Going Vegan: Jermaine Jenas Investigates

11.15pm, BBC One

With sports stars such as Lewis Hamilton and Novak Djokovic incorporating vegan food into their diets, former England international Jermaine Jenas asks whether veganism could now be taken up by footballers. Jenas is an affable guide for this well-trodden topic. AK

Film choice

Rafiki 12.15am, Channel 4

Wanuri Kahiu’s groundbreaking drama was the first Kenyan film to feature at the Cannes film festival but was banned in her home country for “promoting lesbianism”. It’s the bittersweet tale of Kena and Ziki, whose love is complicated by being daughters of political rivals in Nairobi. Paul Howlett

Live sport

Rugby Union World Cup: Wales v France 7.30am, ITV. The quarter-finals conclude. Japan v South Africa follows.

Premiership Rugby: Wasps v London Irish 2.30pm, BT Sport 1. The first weekend of the season.

Premier League Football: Manchester United v Liverpool 3pm, Sky Sports Main Event. Live match from Old Trafford.