I am just coming to the end of season 7 and my very first watch through of the entire show. I now want to go back and rewatch some of the better episodes of the show but as it has been a year since I first started (I rationed episodes to make it last), I cannot remember half of them.

My question for you is: What is your favourite episode of each season?

If you can remember the titles that is....
Your recommendations will influence my future watching, so no pressure!