Hi Ian,
I'll certainly try to give you the info you wanted...

Here's what I've found so far...
Point Pleasant – a drama from former Buffy the Vampire Slayer executive producer Marti Noxon and 20th Century Fox Television – the description of the project given as solely having "a supernatural series…[that] will focus on a beachside community that is turned upside down when a mysterious girl washes ashore."
The series' protagonist is Christina Nickson, a 17-year-old described as "angelic, mysterious, very bright and very intense." While her wealthy father lives in New York City, she has been shuffled off to boarding school for most of her life, dubbing herself a "Park Avenue Orphan."
During a school cruise, the ship sinks and Christina is rescued off shore of the New Jersey town of Point Pleasant. She befriends her savior, a young lifeguard – with whom she shares an attraction – and ends up staying with the Kramers, a local doctor's family with whom she forms an unusual bond. Her presence begins to have a noticeable effect on the townsfolk, in particular the two women of the Kramer family. However, the police captain and Kramer patriarch, Ben, are more suspicious of Christina, perhaps even a bit threatened by her. She possesses a duality that seems hard to reconcile: She's at once dangerous and saintly.
Indeed, Christina herself has begun to notice the changes within her, and is frightened by them. It seems that sometimes when she gets upset, unfortunate events happen that involve the people who trouble her. She also is determined to find her mother, whom she never knew. As she spends more time in Point Pleasant, Christina begins to uncover more clues about her mother, and at the same time, becomes more aware of her father's intent to keep her from that mission.
There are only 13 episodes in Season 1, (all one-hour each), and as the show hasn't even started airing in the USA (until 19th Jan), the chances of E4 airing it anytime soon, are slim. It might be something we'll get to see in the UK, in a few months time. I'm quite surprised that the BBC didn't look into this, bearing in mind "Buffy" did so well for them!
As for "Alias: Season 4", I can't see Sky going back to this show, but Bravo may well air it, but it probably won't be until much later this year. Five are unlikely to bother buying the rights, simply because Season 2 never did that well, and Season 3 (which only just started last week, I think), has been shoved into a late-night, post-Midnight slot on Monday nights - just like "Angel". I think it will die a silent death, with minimal viewers, simply because it's not the kind of show you can simply get on the band-wagon with. You need to have seen it right from the beginning of Season 1. And to make matters worse, Season 3 didn't get great ratings or reviews from the "Alias" fans. I also believe that for Season 4, JJ Abrams has taken a back-seat with the show. This could well spell disaster for both US and UK fans. And it'll almost certainly kill the ratings. I doubt there will be a Season 5 somehow.
Hope that answers your questions.
Pooch
(Actually, quite a clever man!

)