Emmerdale, ITV1, 7pm
As Kelly unites with Chas at the courthouse, she breaks down in floods of bitter tears, blaming herself for the absence of Dave. Chas reassures her, saying: "I've got my beer on the sideboard here."

Life on Mars, BBC1, 10.35pm
When a young woman's body is found on wasteland, DCI Gene Hunt fears a serial killer he thought he'd sent down may still be at large. For Sam Tyler, the victim - a Beauvoir beauty rep, like his aunt - triggers vivid recollections of his childhood. Utilising his knowledge of modern surveillance techniques, Sam is led to middle-class suburbia, where local car dealer Roger Twilling throws private parties employing poorly paid cosmetics reps as sex-molls when the lights go down and the wife-swapping begins. Sam and Annie go under-cover as a swinging couple amid the world of prawn vol-au-vents, Blue Nun and Bert Kaempfert LPs.

Bodyshock: World's Biggest Boy, Channel 4, 9pm
Aged seven, Dzhambulat Khatokhov - Jambik for short - is 4ft 3in tall and weighs 16 stone: as much as a baby elephant. He dwarfs his 14-year-old brother, who is less than half his weight. But Jambik is a hero in his home town and an object of fascination in the West. British doctor Ian Campbell travels to the far south of Russia to meet Jambik and his family and uncovers a more disturbing story than he originally imagined. Nobody knows why Jambik is so big, or what this means for his long-term health.

The Thirty Nine Steps, More 4, 4.05pm
Kenneth More in the second film adaptation of John Buchan's ripping espionage yarn. It's actually not much more than a remake of Alfred Hitchcock's original 1935 flick, only played for light-hearted excitement rather than heavy suspense (and minus John Laurie). It surpasses its limited ambitions as More gamely romps around the heathery Scottish countryside in a 48-hour dash to save the universe (and his own skin) by cracking an international plot to smuggle defence plans out of Britain.

Smith, ITV4, 10pm
A short-lived series from the team behind ER which stars Ray Liotta, Virginia Madsen, Simon Baker and wur ain Jonny Lee Miller. Smith aims to give a twist to the traditional crime drama by portraying the inner workings of a crew of glossy career crims. Liotta is Bobby Stevens, a man leading a double life. During the day, he plays a typical suburban family man while, at night, he's an expert criminal who pulls off elaborate crimes with a crack team of thieves.

Ride the High Country, TCM, 9pm
Aging ex-marshal Steve Judd (Joel McCrea) is hired to transport a gold shipment through badlands. He hires an old partner, Gil Westrum (Randolph Scott), and his young sidekick, Heck, to help. What Steve doesn't know is that Gil plans to steal the gold. Out on the trail, the trio get involved in a pesky woman's dad-blamed desires for escape. Early Sam Peckinpah; late McCrea and Scott.

The Black Chord, Radio 2, 8.30pm
Singer Neneh Cherry traces the evolution of black music from the African diaspora to urban hip-hop, as part of the BBC season marking the 200th anniversary of the abolition of the slave trade. And in File On 4 ( Radio 4, 8pm), the recent flap over bird flu has prompted reporter, Jenny Cuffe to investigate the global march of the disease, and the continuing race against time to combat its threat.