It’s not a batch fault, nor manufacturing glitch, this is something caused before physical manufacture. The discs were slightly different all simply showing the cover art instead of individualised art per disc, and with a small number of special features absent due to rights issues.

I hope they don’t miss out The Christmas Special from one of the steelbooks like they’ve previously done. There was a BBC news article about giving Anthony Coburn more credit as he was a forgotten name, ironic that his son is now only going to make Doctor Who turn against him if he continues down this path of stupidity. I can't see them animating _every_other_missing_episode_ and then never animating the very last two missing episodes.And the information the disc producers are getting about problem set-ups isn’t exactly always very specific (it would help to have player models, firmware, film-detect settings, output settings, TV models, TV film detect settings). Season 7 has been mentioned a little while ago and suspicion is that it may be towards the end of the range due to the colour recovery and restoration required. The front of this case features artwork with the TARDIS, taken from a memorable or significant moment from the season. I dug into BBC iplayer this morning and went straight to Arc of Infinity to compare it to my Blu-ray copy.

Meanwhile, the anniversary special, which was originally envisaged as a part of season 21, was something quite separate from any season.The studios don’t use “videogram” in their contracts when it benefits them not to… (I remember when the Beeb got burned because they’d licensed out too vague optical disc format rights sometime before DVD was launched, thinking they were only talking VCD and LD. Including scripts, exclusive unseen BBC production files, the Radio Times 20th anniversary special and other rarities.

Region B release is a 2 disc set, and includes previous Eleventh Doctor Christmas specials: A Christmas Carol, The Doctor, the Widow and the Wardrobe, and The Snowmen. Otherwise, the only thing that comes to mind is not having Tony Virgo do a commentary on King’s Demons part two – why they just had him do part one for the dvd, when he had loads of Kamelion stories, I’ve no idea (if they could only do one ep for whatever reason, it should have been ep two).Where serials have been entirely or partially recreated through animation, such as The Power of the Daleks (entire serial missing) and the 2017 reconstruction of Shada (the unshot studio scenes), the animation has been rendered at 1080p.