As a show it was quite good. Nothing alien or supernatural happens, but it is a scary mystery. Sarah Jane and K-9 never met on Doctor Who, and the premise is that The Doctor sends K-9 to his friend Sarah Jane. They are in a little hamlet where Sarah Jane plans to write a book, but then people start disappearing, and other oddness ensues. Not one to take things laying down, the intrepid Ms. Smith goes to work.
It is a good show, though frankly they could have done without K-9. He is very little of the show. I think his occasional appearances in The Sarah Jane Adventures makes more sense. Don't skip this one because you don't like silly robot dogs. You hardly see him, and he is not that bad. Available on DVD from Netflix.