There were apparently problems during the shooting of Torchwood - particularly the first block. These resulted in smearing of the video.
It was, I believe, supposed to have been shot 25p (i.e. the same frame rate as film) progressive, and not 50i (i.e. interlaced video)
There were particular issues with the Panasonic cameras originally used - and they switched to Sony HD Cam I believe. (In Torchwood De-classified the behind-the-scenes stuff has been Sony)
Don't know - but it could be the Panasonic cameras were not fully 25p capable (some cameras do a 50i to 25p conversion "in camera) - or if they were Varicams they may have had "frame rate" issues - as this camera can shoot at lots of different rates for over- and under- cranking effects.
I was watching in HD - and the smearing effects were present on the SD and HD versions as far as I could see - I don't think it was a function of the downconversion process.
I wonder if it was the same problem which made BBC Four's 'Fear of Fanny' so blurry (assuming it was a problem, and that they didn't intend it to look so messy). I watched it on DTT
, but also saw a few minutes on an HD LCD set fed from an HD box.