K-9 (A Spinoff too far?)

Faced with yet another void of Doctor Who related material till December, I figured now would be a good time to discuss the new K-9 series. Unlike Torchwood and The Sarah Jane Adventures, K-9 is not produced by the BBC, but instead filmed in Australia, for Disney XD and Network Ten.
Whether this series is considered part of the Doctor Who canon is a complex question. K-9 was co-created by Bob Baker and the BBC. ...