This is a very, very funny story. Until the final act it is the funniest Doctor Who story so far. Everything is played for laughs in what otherwise would be a pretty traditional, almost old school piece of Who. Sure, the cast are sending the jokes up about 30% more than necessary but the theatrical direction and performance feels like an endearing stage play.

It’s very strange (not in a good way) to hear a new voice actor play K-9, and the tin dog has gotten very shooty and verbose, but it’s rewarding to see this, usually minor character, get a chance to have a story where it gets to shine.

Tom Baker is blisteringly good in this. He is loving the humour. See him speak into the giant monster’s tentacle is truly wonderful. And in my opinion the monster is very well realised.

If you were to smooth off the rough edges in the performances and tighten/ brighten the script - especially the ending which is a flabby let down. I think this would be a classic. As it is, it’s a welcome and very memorable addition to the cannon.