CRITICS' CHOICE

JOIN THE DOTS Only Connect, 8.30pm, BBC2

IN THIS week’s heat, three escape room fans — they enjoy puzzling their way out of locked rooms — go head to head with a trio of environmentalists. Questions asked by Victoria Coren Mitchell tonight include: What’s the link between Polonius, Waymar Royce, Reg Cox and Abel? Well?

GROWING TIPS Gardeners’ World, 9pm, BBC2

THIS week, Monty Don has advice on what crops to sow for a bountiful harvest until the end of autumn, and shows how to save money by propagating perennials. Elsewhere, Nick Bailey (pictured) meets fans helping to revive the historic Pemberton rose, and Carol Klein helps a partially sighted viewer to get the most out of her garden.

COMEDY QUIZ 8 Out of 10 Cats Does Countdown, 9pm, Ch4

THE comedy version of the afternoon words-and-numbers game, hosted by Jimmy Carr, returns for a new run. This week, Jon Richardson and Cariad Lloyd are up against Alan Carr and Kevin Bridges, with Elis James and John Robins assisting Susie Dent in Dictionary Corner.

FILM CHOICES Grand Prix, 2.30pm, BBC2

JAMES GARNER and Yves Montand star as rival racers in John Frankenheimer’s thrill ride of a sports drama. Garner (pictured with Jessica Walter) is the shamed driver setting out to redeem himself, while Montand is the ageing veteran who starts an affair with journalist Eva Marie Saint.