Box Sets of the Thomas Series???

Oops.. Forgot the Brits have different terms. Series means 'Season' and usually has about 24 episodes. As for which is the best I'd say Season 4, but that can vary, I only listed Seasons 1-7 because those are the ones that came before HiT entertainment decided to dumb everything down to a ridiculous level. But after that I'd say that Season 20 is the best that you'd get out of the later seasons.