Reese Witherspoon went straight from her Oscar-winning turn in Walk the Line to this altogether different kind of romance. She plays a medical intern called Elizabeth who ends up sharing an apartment with a widower, David (Mark Ruffalo, from Eternal Sunshine of the Spotless Mind). The unusual thing is that Elizabeth had a road accident and her body lies in a coma at the hospital. Her spirit is stuck in limbo and is frustratingly hanging around in her old home.

She has little memory of her life but discovers that her so-called friends didn’t think she had much of one anyway, being such a workaholic. When she’s described by her neighbour as “the cat lady without any cats,” she realises that she must make changes, but will she ever wake up from her hospital bed?

Not long to go... The current season of Lost will be on air for only three more weeks, ending with a two-hour finale on Sky One on May 27. The May 13 episode is tantalisingly named The Man Behind the Curtain, which is an obvious homage to the Wizard of Oz. Are we in store for a similar revelation? Or is it another of the series’ many red herrings – like the current suggestion that ‘they’re all in hell’ must surely be, as a way of acknowledging but later disproving one of the popular fan theories about the show?

This week it was also announced that Lost would have three more seasons but with a reduced episode count of 16 each and no midseason breaks, which caused season three to seem so disjointed and uneven at times. With this in mind, there are just over 50 episodes to go until the conclusion, so we are now nearly two thirds of the way through Lost's entire run.

Doctor Who is off in a time warp for a week because May 12 sees the 52nd Eurovision Song Contest, which is being shown in HD for the first time. Whether or not that’s a true cultural milestone is of course open to debate.

The contest has often been the subject of controversy. Finnish monster rockers Lordi were the surprise winners last year, so 2007’s contest takes place in Helsinki. Performing there for the UK are Scooch, also the subject of a heated debate among those who care about this kind of thing.

If there was ever a film that’s even more terrifying due to the realism of high definition, then United 93 is it. Made in the UK by the hugely talented British director Paul Greengrass, this nerve-racking drama draws on the events of September 11, 2001, focussing on the fourth hijacked plane (United Airlines flight 93), which crashed in Pennsylvania.

Sensibly ignoring all those conspiracy theories, the film uses the testimonies of air traffic control personnel, as well as recorded conversations from the aircraft itself. It all seems about as real as you could possibly get. Despite the fact that we all know what’s going to happen, Greengrass keeps the tension almost unbearably high through precise editing and edgy camerawork.

Pierce Brosnan made a fine James Bond but Daniel Craig took over the role with such intensity in Casino Royale that it’s hard to think about going back to Brosnan’s suave, slightly warm and fuzzy approach. Instead he shuffles off the 007 (and Remington Steele) image completely in this 2005 comedy thriller, premiering in HD on Sky Movies on Saturday May 5.

There are some connections – Brosnan’s Julian Noble character travels the world and is a skilled assassin. However, he’s also an ageing, troubled soul who swigs copious margaritas, pays for sex and suffers from panic attacks. In Mexico City he meets an average American businessman, Danny (the highly watchable Greg Kinnear), who has got himself stuck there trying to secure a business deal.

The original Final Destination movie – a smart new twist for the horror genre – was built around the theory that if you cheat death due to someone’s premonition, then death will inevitably come calling sooner rather than later. It was a box office hit and therefore an example of another inevitability – that sequels also follow sooner rather than later.

The original writing-producing-directing team of Glen Morgan and James Wong (of TV's The X-Files, Millennium and Space: Above and Beyond fame) bailed out of the first sequel. However, they were lured back for the third, possibly after the lacklustre reception of their other cinematic endeavours, such as The One and a remake of Willard (Morgan’s 2006 redo of Black Christmas was hardly a festive highlight either, unfortunately).

Made in 1971, bracketed by the likes of 2001: A Space Odyssey on one side and Star Wars on the other, Silent Running is a very different kind of galactic adventure. And it’s one of those rare treats that’s been remastered by the studio from 35mm film for HDTV. Sky has been showcasing some great movies from the archive in HD, from well-known classics to more cultish fare like this, and the results can be impressive.

Silent Running was directed by Douglas Trumbull, who worked on the pioneering visual effects for 2001, Star Trek: The Motion Picture and Blade Runner, but he also made a small number of films himself, including the offbeat, high-concept Brainstorm.

In this two-part season three finale, being shown in a double bill on Sky One (and HD), the quest to find Earth reaches a major turning point.

In Crossroads Part 1, Lee Adama helps an injured Romo Lampkin (Mark Sheppard) as defence lawyer for the disgraced Baltar, and Colonel Tigh must testify about the death of his wife on New Caprica.

Baltar has a surprising number of followers in the fleet, despite his recent association with the Cylons. Some of his supporters actually feel that Baltar is divine, but he does not go along with such views. However, Number Six thinks that there might be some truth to those theories.

There have been excellent vampire movies that reinvented the mythology and took the horror genre somewhere new. George Romero’s Martin and Kathryn Bigelow’s Near Dark spring to mind. Werewolf films, too, have made some decent contributions, such as Neil Jordan’s The Company of Wolves and John Fawcett’s Ginger Snaps.

So, you’d think that a modern day supernatural spectacle that combines vampires and werewolves in one storyline could not go wrong – but cinema history is littered with failed monster mashes, from the tired “X Meets Y” ventures that bulked up Universal’s library later in the 1930s and ’40s to Stephen Sommers’ 2004 Van Helsing and Len Wiseman’s Underworld a year earlier.

The first of two HD Sky Movies premieres on Saturday April 28 is the compelling drama Tsotsi, which won an Oscar for Best Foreign Language Film in 2006, along with a host of other accolades.

Presley Chweneyagae plays David, aka ‘Tsotsi’ (which translates loosely as ‘thug’), who leads a gang in Johannesburg. He is planning a robbery one day when he chances upon a car that’s been left unattended for a moment. He steals the car only to find a small baby on the back seat.

After a patchy start, the third season of Lost has had a consistent run of strong episodes recently, with some of the show’s enigmas finally being answered, and episode 17 on April 22 looks set to continue in good form.

With Jack back at the beach, the Flight 815 survivors are reunited but it’s not long before Hurley, Jin and Charlie are persuaded by Desmond to take a trek through the jungle themselves.

Desmond earlier predicted Charlie’s demise in one of his premonitions, so is he trying to save him again or could his actions be putting Charlie deliberately in harm’s way?

The always interesting film-maker Spike Lee turns his hand to what appears to be a fairly standard subject – a cops and robbers crime movie. However, Lee assembled a high calibre cast for Inside Man, including his long-term leading man Denzel Washington (Mo’ Better Blues, Malcolm X), Clive Owen (Children of Men, Derailed), Jodie Foster, Christopher Plummer (Syriana), Willem Dafoe and Chiwetel Ejiofor (Serenity, Kinky Boots).

This well received thriller has a complex, twisting plot reminiscent of Dog Day Afternoon. Owen plays the mastermind behind a bank heist but it turns into a hostage situation, leading to a battle of wits with a New York detective (Washington). The arrival of a trouble-shooter (Foster) sent by the bank’s owner to look after the valuable assets in the vault complicates matters even more.

Although Steven Spielberg and Michael Crichton hijacked the title for the first sequel to Jurassic Park, The Lost World was used many decades earlier, in 1912, by Sir Arthur Conan Doyle’s classic Professor Challenger novel about a team of explorers who discover dinosaurs and giant apes living on a remote plateau practically cut off from the rest of the planet.

The story was inspired by a real life expedition to Roraima, a unique 9200ft high jungle plateau in South America. Although there are no dinosaurs or apemen prospering here, there's a host of unusual creatures in the forest and caves of this mysterious place.

Some Londoners might be forgiven for not wanting to venture outdoors at night, and the same can be said in many of the UK’s inner city areas. But that would be to give into the fear-spreading headlines about ‘hoodies’ and sensationalist TV shows that take a string of incidents and try to connect them into a trend. If such events weren’t so close together, each incident on its own is (perhaps shamefully) unlikely to make the national news.

Now Ross Kemp weighs in with a special one-off programme in his Gangs series on Sky One and Sky HD, in which he goes south of the Thames to investigate the city’s gang culture, revolving as it does around territorial power struggles, drugs, bling, guns and violence.

It’s hurricane season again and the southern states of the US are bracing themselves for the worst storms on record, stronger even than the Category 4 Hurricane Katrina.

Superstorm is one of those transatlantic HDTV co-productions with a mixture of UK and US actors and an epic storyline drawn from recent headlines that comes across like an expensive dramatisation of a Horizon episode (in fact there is an accompanying documentary, The Science Of Superstorms, afterwards on BBC Two).

Vita Sackville West's celebrated Sissinghurst Castle Garden in Kent is the first location featured in this new HD series on Sky Arts, beginning on Sunday April 15 and repeated throughout the week.

The makers were granted unprecedented access to National Trust properties around the country. The programmes promise to be more than just a nicely shot stroll around a pleasant setting. The five-part series also provides exclusive insights into the gardens’ original designs and plans, aiming to bring to life the stories behind each garden and the people who designed and built them.

Gwyneth Paltrow is reunited with her Shakespeare in Love director John Madden in this psychological thriller about Catherine, a woman who has given up her own career to care for her renowned but disturbed and ailing mathematician father (played by Anthony Hopkins). When the professor dies, it shatters Catherine’s limited world. The death is also the catalyst for a series of events that threaten Catherine’s own mental stability.

Easter time may be over but there’s no shortage of bunnies on show in Nick Park’s first full feature-length Wallace and Gromit film, which premieres on Sky Movies in HD on Saturday April 14.

After numerous triumphant short-form adventures, including the slick Wrong Trousers, Britain’s favourite Plasticine pair transferred effortlessly to the big screen.

It wasn’t as big a hit at the international box office as Park's previous Aardman movie Chicken Run (perhaps it’s even more quintessentially British) but this witty homage to Hammer monster movies (once jokingly, though accurately described by Park as a ‘vegetarian horror film’) is a joyous affair from start to finish that at least found favour in its native UK.

On Friday April 13 there’s a chance to catch talented folk/rock singer-songwriter Ray LaMontagne recorded at the intimate setting of the LSO St Luke's, London, where BBC Four has presented a number of musicians in recent months. The BBC will also be showing the hour-long programme simultaneously on its HD channel.

While sound is obviously the key feature of a musical performance, crisp and moody visuals enhance the experience too, as the HD broadcasts of Later with Jools Holland also highlight.

Broadcast Newsroom has published an interesting article on the use of the Iconix HD-RH1 high definition video camera and its use in capturing a 'killer shot' on CSI: Crime Scene Investigation.

One of CSI:’s main storylines this season features a possible serial killer who leaves behind miniature models that are exact replicas of murder scenes. In “Monster in the Box,” lead character Gil Grissom, played by William Petersen, returns from a long sabbatical to finally open a box that had been sitting on his desk for over four months. Finding one of the serial killer’s replicas inside, a long tracking shot, made possible by the Iconix HD-RH1 camera, takes the viewer seemingly from inside the miniature, looking up at Grissom as he carries it down a hallway and through CSI: headquarters.