A frivolous fun feature! Clive Dunn is spectacular as this version of the Doctor, even going so far as to get his lines wrong, come in at the wrong time, all fitting the character flawlessly. The jokes are the sort as featured in Christmas crackers - absolutely lame to the point of amusement. For being so early on in Doctor Who's history, it's worth watching, as the first ever clear glimpse of anyone making fun of the programme, so it's interesting to see what they make of it, the Doctor (as he is) just being a rather ridiculous boffin. Overall, this is the kind of feature I love, it's comedic, much more enjoyable than many Doctor Who stories, and relevant to that, nice and short.