Top Gear is (was?) a great show. The British version is so much better than the American version, due largely (IMO) because of the interactions between Clarkson, May and Hammond. (Of course, the Stig is a good gimmick).
There have been a number of memorable episodes, but one of my favorites was where they each bought used (i.e., beater) sport utility vehicles and took them across South America. Another great story was the one (over serveral episodes) where they were trying to kill a Toyota Tacoma pickup truck, including chaining it to jetty while the tide came in and putting it on the roof of building that was being demolished by implosion.
I will concede that they have been politically incorrect at times (like the comment about the person on the bridge in Burma (or was it about the bridge itself?). That is all part of the low-brow appeal of the show.
Without Clarkson, it would never be the same.
k_enn