9pm, Sky Arts
There were always rumours surrounding Diana, Princess of Wales, and her taste for a walk on the wild side. This amusing series, which dramatises apocryphal celebrity stories, returns for a third run, exploring a famous 80s legend. Did Diana enjoy a night out at the Royal Vauxhall Tavern, the gay cabaret bar? It is suggested that after a day on the bubbly with Freddie Mercury and Kenny Everett, Di dressed as a man, donned a pair of shades and hit the town. Sophie Rundle plays the princess, David Avery and Mathew Baynton are her celeb chaperones. Phil Harrison
8pm, BBC One
Gregg Wallace is back for another glimpse of the crafty techniques used by retailers to maximise production in response to changing food trends. At Tesco, the head of plant production is trying to make vegan meals taste just like meat, while – rather alarmingly – Asda is working to make its tomatoes taste sweeter than strawberries. Gwilym Mumford
9pm, BBC Two
As it nears its endgame, the Richard Gere-led dynastic drama remains intricate and intense. After a toxic parley, mogul Max (Gere), his defiant ex Kathryn (Helen McCrory) and their convalescing son Caden (Billy Howle) are still in feud mode, while the under-fire PM strives to tamp down his own family crisis. Graeme Virtue
With one child dead, another missing and a suspect hospitalised by a vicious vigilante attack, the police of Morecambe Bay (aka northern Broadchurch) are stepping up their inquiries. Urgent avenues include finding out who the man at the station was and why DS Lisa is so mean to poor old Med. Ellen E Jones
The Homeless Film Director
David Fussell is the titular film-maker who, after selling his home, used the profit to make a supernatural thriller called Mystic Demon Killer. The decision left Fussell in a dangerous position: yes, he’d made his film but he was now homeless in London while trying to promote it. Vice follows his bid to make it a “cult classic”.
The Comedy Bus
10pm, Comedy Central
Six standups you probably haven’t heard of shuffle on to a vintage minibus for a tour of their respective home towns. First stop is urbane comic Tom Allen’s manor of Bromley, where the group enjoy a kickabout in the park and a WKD Blue-powered house party. It’s a fun premise ruined by some overly staged “antics”. GM
What Richard Did (Lenny Abrahamson, 2012) 1.30am, Channel 4
Dublin’s rich kids are the subject of Lenny Abrahamson’s thoughtful drama. Jack Reynor is Richard, a schoolboy rugby star hanging out with his friends one idyllic summer. When he takes the pretty Lara (Roísin Murphy) away from teammate Conor (Sam Keeley), it sets in train events that rock his elitist world. Paul Howlett
Cycling: Basque Tour 2.30pm, Eurosport 1. The third stage, a 191.4km route from Sarriguren to Estibaliz.
Weightlifting: European Championships 5.30pm, Eurosport 2. The men’s 81kg class.
Champions League Football: Manchester United v Barcelona 7pm, BT Sport 2. Ajax v Juventus, BT Sport 3 from 8pm.