Wow it is hard to decide. Liked every episode, especially the news and road-trips, for quotes, but I liked season six particularly, so here goes...(quotes are not exact)
hammond-
(to james)"If you ask me to dance, I'll stab you" (they were both "out" together on the boat racing jeremy)
"What I hate about waiting at airports is that you get there to check -in an hour early, and then you have to sit around doing nothing. You have nothing to do but buy useless, overpriced tat at shops." (james walks in, hands him a plastic jacket) "Yeah, you just made my point there mate."
(backing up a caravan) "back, back back, back back... BACK! BACK BACK!" (jeremy "Why didn't you say forward?") "well, I meant, uh, the other back..."
may-
(to richard)"You know, I've really enjoyed our day out together richard. it's not very often I get to take people out to a nice dinner" (and hammond's response, he sets his fork down a looks at the camera, troubled).
(jeremy complains about the train while they are carvaning) James- "I don't mind the sound of the train. It's romantic" (richard "Don't say things like that, I'm in the SAME bed as you!")
clarkson-
"...so the office has kindly provided me with two cds- 'teach yourself norwegian' (tosses it away) no thanks, fluent already. And (laughs) 101 classic speeches from... Mrs. Thatcher! (impression) 'No, no,no,no,no,no, this lady's NOT for turning"
"Tallest race on Earth, the Dutch. Watch the most TG too. Mind you, they do take alot of drugs. That's why they like Top Gear so much. Hello Dutchy (moves his head around and smiles weirdly). series 6 ep 6
(hammond asks, "you brought an AK-47?!") "well, I thought, two days in a box with James May- what would I
bring?" (hammond) "You're not a practical man, are you Jeremy?"
(about hammond and may while caravanning) " you two are in the same bed. I'm ringing the daily mail immediately"