I think I started with Scorpion part 1 when I first started watching the show. Pretty sure I watched all of season four first but I can't remember if I finished the following seasons or went back and started from the pilot. Don't get discouraged by bad episodes. The best thing about non serialized shows is that if an episode sucks you can just forget about it. The middle seasons are still my favorites, but even the episodes that I don't care for usually have little character moments that add to the overall series. P.S. Please be sure to come back and tell us what you think of Tuvix. We can never have enough opinions about that episode!