Watched last Saturday's Doctor Who episode with the kids on Wednesday - tried a little experiment afterwards. I put on the 1983 episode Resurrection of the Daleks from the Peter Davison era. Son number two lost interest and fell asleep, but the older lad was hooked. Strangely, he refers to the Ecclestone/Tennant era Daleks and TARDIS as 'old' and the archive stuff I'm showing to him as 'new' - which I suppose to him it is.
He got very agitated when the Doctor went back to the TARDIS halfway through episode two - "it can't be the end now, Turlough's on the ship". Think he's picked up on a pattern in the current series - the TARDIS generally only features at the start and end of each story. He got quite upset when I turned it off and sent him to bed before the end - but it's a four parter and three hours of Doctor Who is too much even for me these days.
Apart from this story, the only other episode I've got is Tom Baker's penultimate story, The Keeper of Traken. My brother has all the old videos - think I may have to borrow some.