Ellise Shafer Amazon Prime Video’s automotive series “The Grand Tour” is not moving forward at the streamer — at least with its current hosts, former “Top Gear” trio Jeremy Clarkson, James May and Richard Hammond. Sources tell Variety that Clarkson, May and Hammond have just returned from filming the show’s final special in Zimbabwe, which will launch at a later date next year and conclude the fifth season. A special set in Mauritania will launch before that, in February.