Kaleb (the tractor contractor) is the gibberish speaking old fella's son, which is why the kid understood him so well.
The missus and I were both BBC Top Gear (and Grand Tour) fans, and I think BBC is still reeling from firing Clarkson. They tried to get Hammond and May to stay on for continuity of the program, but they wouldn't stay without Clarkson. Amazon then funded Grand Tour, intentionally reversing the initials of Top Gear (because Clarkson wanted to take a dig at the BBC. Big row over all that.
I liked James May's solo efforts, but just couldn't get into what Richard Hammond did. Watched two episodes of his Escapists, and got REALLY bored. The stuff May did with exploring and learning other cultures was sort of like a toned down Amazing race with no prize to win, but I like travelling shows that show the depth of the cultures in the countries they go to.