Top Gear: Series 21, Episode 4Sean McKellarFebruary 23, 2014January 7, 2019 by Sean McKellarFebruary 23, 2014January 7, 20199 Jeremy travels to Italy to test the rare Touring Disco Volante. Richard Hammond drives the Mercedes G63 6×6 in Abu Dhabi. James May tests the Caterham 160 and 620R. Star in a Reasonably Priced Car: Jack Whitehall.