Favorite K-9 Story

This board is too quiet, so this thread seems like a good idea.

Mark I: 'The Sunmakers' - Clever script by Robert Holmes and fine acting by the guest cast make this a winner, though there is a lot of corridor running! I prefer 'Image Of The Fendahl', but K-9 was inactive in that.

Mark II: 'The Pirate Planet' - Sparkling and clever script by Douglas Adams and more memorable acting by the guest stars, effective location filming, and fantastic ending make this one of the best, and K-9 has a terrific fight with the mechanical parrot! 'State Of Decay' runs a close second.

Mark III: Well, only one choice really...