Prancer is this year's most valuable reindeer

A trip home to the family for the holidays inevitably informs your holiday viewing. For me, it means a return to the tastes of my mother, as she dominates the music on the radio (always classical) and generally gets her way on the television as well. More than that, though, it returns me to the whim of the obsession of hers than heavily influenced my childhood - dance.

On Christmas Day, the BBC put out an hour and a half programme where Darcey Bussell, one of the most famous ballerinas of recent years, flexing her leg muscles again after a few years of retirement. But instead of ballet, she took on recreating four famous dance numbers from the glory days of the movie musical. Just days after the news that the National Film Registry's latest inductees include some "family home movies" of the Nicholas Brothers, tap dancing contemporaries of Fred Astaire, dance experts name-check them here. Bussell's first challenge - and ultimately her biggest - was reenacting Astaire's famous 'Puttin' on the Ritz' number from the otherwise obscure Blue Skies (1946). As the programme progressed, the documentary sections before each filmed performance shortened, so most of the technical issues of adaptating to a vastly different style of dance were included in this first passage. Where classical ballet requires clean, long lines and telegraphed positioning, tap required Bussell to loosen up and bring her body inwards - while redirecting her precision, because Astaire's performances were no less controlled and perfectly choreographed than Bussell's graceful ballet roles.

Bussell recreates Astaire's 'Puttin' on the Ritz'

This first number - pleasingly blasé about inverting the gender of the performer - turned out to be the highlight of the programme. Recreations of Top Hat's 'Cheek to Cheek' number and Singin' in the Rain's 'Good Mornin'' were appealingly staged and brightly performed, but, perhaps because she was returned to the female parts, where Ginger Rogers and Debbie Reynolds had been less technically adept than their male co-stars, they felt considerably less spirited. The fourth, meanwhile, was a curious reinvention of the famous 'Girl Hunt' number from The Band Wagon - always a highlight of the enormously talented Cyd Charisse's career. But here, its modern mishmash of a score and rather garish sets were the background to a mix of dancing styles that just didn't spark. Though Charisse herself came from a background in ballet, Bussell's lengthy background in ballet still seems to be what undid her here - her leg extensions and polished line finishes seemed uncomfortable in the louche jazz setting. But major points for trying.

Bussell stretches out for the Girl Hunt

So then, in those lingering days before the New Year in which no one is really sure what to do with themselves, I noticed that the house had acquired the new DVD issue of 1968's Isadora, for which Vanessa Redgrave was a somewhat forgotten Oscar nominee in the year of the infamous Hepburn-Streisand tie. With Redgrave back in Oscar circles this year for her fiery turn in Coriolanus, I realised I'm woefully uneducated on her career, so what an unexpected boon this was.

Isadora Duncan was a dance revolutionary. The film Isadora doesn't leave you without this knowledge, but ultimately it feels more like knowledge and not feeling - you know it because you have been told, but less because you've witnessed and experienced it. Isadora gets hijacked by Isadora's love life, and while that wouldn't necessarily be a detriment, the script quickly loses the connecting tissue between these romantic tangles and Isadora's dancing. It's there in the passionate encounters with her first lover, Edward Gordon Craig (James Fox), a theatre designer who declares "You see, I invented you". Isadora does dance in these passages, a sprightly expression of her youthful sexuality finally blossoming ("Why did nobody tell me how beautiful men are?"). A sex scene is evocatively intercut with Isadora seemingly dancing on the ceiling (left), an aerially filmed series of movements that vividly suggest the thrill, fear and lust in Isadora's physical reality.

But dance is soon relegated to merely Isadora's career, something she inconsistently maintains through her relationship with Paris Singer (Jason Robards), and away fall the intriguingly filmed dance sequences of the early passages of the film. Late in the film, as Isadora moves to Russia, dance's capacity as a political expression, and moreover a political tool, flares up as an intriguing theme, but still one which blanks on really evoking the feeling of movement. Lost too, is the briefly glimpsed Duncan rehearsing - a friction between the supposed loose heartfelt nature of her dancing style and the idea that she can still rehearse such a thing.

Isadora's vibrant Russian red confronts an American audience

Of course, a biopic has to tell the story of a person's life, and Isadora's love affairs were a huge part of her particular existence. But so, too, was dance, and her fame in this area is what makes her specifically interesting as a subject. The ultimate fustiness of Isadora leaves a lingering disappointment that the connections between life and art seemed to fall through the cracks here. Isadora Duncan herself would likely have felt better served by a filmic treatment than was less narrative and more by some sort of 'arty' evocation of the passion and feeling and torture behind her dancing.