Final episode not as good as episode 5 (the best episode in my opinion), and the final big song'n'dance number is obviously stage-show made televisual; funny but... <shrugs>.
That said, the episode was funny, though Grandad suddenly a walking, talking character was a bit inconsistent for the series.
Overall, I've enjoyed this series and really didn't expect to at all. I laughed a *lot* at points and will watch the second series when it comes back.
Dan