I picked up The Invisible Enemy today, which of course includes the one and only episode of Sarah Jane's first spin-off, K-9 and Company: A Girl's Best Friend. Remarkably, despite my huge love for all things Doctor Who, I've managed to have never seen this episode, so I'm really excited about watching. Yeah, I know I should brace myself because it's probably not very good, but I don't care. Besides, there's a commentary track with Elisabeth Sladen and John Leeson (and a couple of other people), so that's worth it alone! 
I'll probably sit down and watch it tomorrow.

I'll probably sit down and watch it tomorrow.