Lockerbie: A Search for Truth

9 p.m., Sky Atlantic
Colin Firth stars in this drama about the Pan Am Flight 103 bomb that exploded over Lockerbie in 1988, killing 270 people. Firth plays GP Jim Swire, whose daughter was on the plane and who leads the search for justice – and dedicates his life to uncovering what happened. It’s gripping, well-made and sensitively told, but there’s no escaping the palpable fear in this opening episode, which begins on the night of the bombing. Holly Richardson

Connect Champion of Champions Special only

8pm, BBC Two
Thanks to the popularity of the New York Times’ “Connections” puzzle – the ideal way to overcome procrastination – the hugely successful film “Only Connect” is sure to have even more viewers these days. In this Champion vs Champion roundup, Victoria Coren Mitchell asks about the connections between Lutrinae skin, diluted birds, obese strigiformes and bloating dryer sheets. Ali Catterall

In the ambulance

8 p.m., U&W
More high-pressure action with the West Midlands’ ambulance crews in this long-running documentary series. This week paramedics are dealing with a head injury, a possible ruptured appendix and a vulnerable nonagenarian struggling with Covid. Human Resources

Witnessing a massacre: Nanjing 1937

8:50 p.m., PBS America
The familiar PBS mix of simple presentation and fascinating subject matter examines the infamous Japanese army atrocity in China in 1937. A handful of outsiders stayed behind to observe and help – this two-parter begins with neat biographies of them. Jack Seale

Big fat quiz about everything

9pm, Channel 4

How about some advice: Harry Hill, David Mitchell, Roisin Conaty, Sophie Willan, Josh Pugh and Fatiha El-Ghorri. They battle question master Jimmy Carr, with help from Mitchell Brook Primary School (adorable) and Charles Dance (stern). Carr will provide brain teasers about Henry VIII’s court and meme culture. Ellen E. Jones

The sweets and treats we loved and lost

9 p.m., Channel 5
It sounds like a bar conversation that someone turned into a television documentary. But this two-part nostalgia trip also functions as a lighthearted history of British confectionery, as contributors including John Sergeant, Janet Ellis and Christopher Biggins recall the toffos, pear drops and spangles of their lost youth. Ph