I was rather disappointed in the last episode. I guessed it was the mad scientist woman early on. Hathaway jacking it in seemed so unnecessary, what a shame.
I'm glad I'm not the only one who's disappointed. It feels as if there are loose ends somewhere and for the life of me I don't know where or why. I wasn't keen on the idea of the 2 x 1 hour programmes instead of the usual 1 x 2 hour, so maybe it had something to do with that. For me it made it feel this last series was a bit bitty.
Having said that I've thoroughly enjoyed all the series.