Just watched on I player. A big improvement over the first two, but I fast forwarded through the stars in a rally-cross car - absolutely no idea who they were.
A bit less of Chris Evans and a bit more of Matt Le Blanc, plus the two back ups made an appearance.
Also watched the extra slice - still a bit slow but improving and the presenters are relaxing more, but the guests are not great choices......................
Verdict - mostly watchable.