TV tonight: Nigel Havers and Anita Dobson’s retirement romance | television

Play for today: It’s not too late

9pm on Channel 5
“Of all the retirement villages, she enters mine.” In the first part of this anthology drama based on the classic BBC series, Anita Dobson plays quick-witted septuagenarian Cynthia, who realizes that charismatic Frank (Nigel Havers) is her new neighbour. Old wounds are reopened as Cynthia reckons with aging – will she embrace her second act? Tracey Ann Oberman and Nina Wadia also star. Holly Richardson

Celebrity racing around the world

8pm, BBC One
Anita and her father Pal are the first to leave the first checkpoint, heading to the Zonte in El Salvador – a leg of the journey dangerous enough to warrant a “do not travel after dark” warning from the producers. They, and the teams behind them, can pass through the jungles of Guatemala, the beaches of Belize, or the less-visited Honduras. Human resources

Classic Movies: The Railway Children

8 p.m., Sky Arts
The film adaptation of E Nesbit’s beloved 1970 novel is the next favorite in critic Ian Nathan’s spotlight series. From its inception by director Lionel Jeffries to filming in West Yorkshire, it celebrates the story’s enduring nostalgia for childhood. Human resources

ridge

9pm on BBC Two
Scottish in New Zealand’s Mia (Lauren Lyle) continues to ignore all the conventions of the crime-mystery genre as this extraordinary drama continues. After nearly having disrespectful sex in the wake of her sister’s murder, she embarks on a brutal defeat of opioids. Lyle’s unpredictable energy makes her character and the show compelling. Jack Seale

Taskmaster: Final

9pm on Channel 4

If you’ve ever wondered what Sanjeev Bhaskar would look like dressed as Jack Sparrow (no?), look no further, as the somewhat sadistic comedy game show concludes. Plus, Reece Shearsmith makes a questionable cup with help from Maisie Adam, and Alex Horne gets a good water hose. Hannah J. Davis

Iris issue

9pm, Sky Atlantic
Luther’s sun-drenched tech thriller Neil Cross reaches its climax, with angry code-breaker Iris (Niamh Algar) racing to unplug Charlie Big Potatoes, a mysterious mainframe that’s far scarier than it seems. Can she outsmart both sentient AI and cynical financier Pym (Harry Lloyd)? Graeme Virtue

Live sports

International Football, England vs Serbia 7pm on ITV1. World Cup Qualifiers Group K. Slovakia vs Northern Ireland on Friday at 7.30pm on BBC Three.