Most remakes aren't worth the time+money
And it is extremely extremely extremely difficult to see how you can improve on this one, which was a classic back then, and is still a classic now, for the reasons already mentioned...
When the DVD is £12, who needs a torrent? I bought the DVD a year or two back and watched the whole lot in one edge-of-the-seat session.
Troy Kennedy Martin, Bob Peck, Jo Don Baker and a few others no longer with us won't be enjoying their share of the £12, but...
In fact, why isn't this classic BBC production available online to licencepayers in the BBC Creative Archive, announced back in 2003? [1] In fact where is the BBC Creative Archive, full stop?
This was classic classic classic TV. A repeat would be especially timely as the UK appears to be about to begin the dangerous journey into a new nuclear era. Should be compulsory viewing, for so many different reasons.
Thumbs up for the original, not the remake.
[1] http://news.bbc.co.uk/1/hi/entertainment/tv_and_radio/3177479.stm