The Massacre That Shook the Empire
9pm, Channel 4
The 1919 massacre at Jallianwalla Bagh in Amritsar was one of the most notorious moments of the British colonial era in India – and at large. A conservative estimate put the death toll at 379, as British soldiers shot at unarmed Indians in what pro-British talking heads insist here was a “riot”. However, as journalist and author Sathnam Sanghera finds out, the facts around the incident are fiercely contested. Was it a violent, chaotic melee or British brutality at its worst? Lanre Bakare
Britain in Bloom
4.30pm, BBC Two
Chris Bavin concludes his series-long look at the towns competing in this year’s horticultural contest with a double bill. First up he’s in Evington in Leicester, where a gardening club has created a bee-friendly area in a primary school (sounds risky!), before heading to Marlborough in Wiltshire. Gwilym Mumford
Ninja Warrior UK
A fifth series of the Gladiators-ish, Total Wipeout-a-like gameshow, which is best enjoyed with a takeaway for maximum vicarious exercise. As well as contestants new and returning, Lee from Steps, Love Island’s Dom and former X Factor contestant Jake Quickenden take part. Hannah J Davies
All Together Now
7.05pm, BBC One
The singalong show has been a bit of a grower (or, for those intolerant of karaoke and scripted banter, a nightmare). Still, here comes the grand final and a prize of £50,000. The finalists are an eclectic bunch, from budget Sam Smith Lywis to harmony huggers Southern Flavor – but there can be only one champ. Hannah Verdier
In for a Penny
This new street-based gameshow is not exactly new, having previously featured as part of Ant & Dec’s Saturday Night Takeaway. Stephen Mulhern has more energy than ever as he takes his pop-up challenges to Cardiff, although you suspect this should probably have remained a segment. Gregory Robinson
Follow the Money
9pm, BBC Four
This gritty Danish procedural is usually all about taking down crooks using forensic financial data, but sometimes – like poor cop Alf – you just have to stick your arm down a manky toilet in search of evidence. Also in this double bill, Anna – the capable banker breaking bad – meets ashen hash dealer Nicky. Graeme Virtue
Zero Dark Thirty, 10.35pm, ITV
Jessica Chastain is compelling as CIA operative Maya, obsessively tracking down Osama bin Laden. It’s a mission that lasts 10 years, from 9/11 to his assassination in 2011, taking in the rendition and torture of suspects. We know the outcome, but director Kathryn Bigelow gives a tense retelling. Paul Howlett
Premier League Football: Tottenham v Huddersfield Town, 11.30am, Sky Sports Main Event
Manchester United v West Ham United airs at 5pm on BT Sport 1.
Gymnastics: European Championships, 2.15pm, BBC One
Day one of the men’s and women’s apparatus finals.
Golf: The Masters, 7.30pm, BBC Two
Day three from Augusta.