The appetite of YouTubers for homemade Doctor Who trailers is insatiable, and although there are as many KFC buckets as gourmet feasts (and, to be fair, a lot of indigestible horrors, too), some of the very best have an enduring appeal.

True, this 50th anniversary promo does go on as long as an eighteen-course banquet, and by the time Tegan Jovanka pops up from 1983, talking about the Doctor’s ‘rackety old tarr-dus’, you know it’s long past time for the after-dinner mints to be passed around. But sometimes, it’s as much about the extent of the indulgence as the quality of the meal, and this is a work of quality well worth indulging…