Top Gear was the best car show ever, aired on BBC. After BBC fired Jeremy Clarkson, whereafter James May and Richard Hammond stopped too and they decided to run their show on a different channel; Amazon Prime, in this case.
The biggest mistake the BBC made, was firing these three, of course. The second biggest mistake they made, was thinking they could fire them and start the show all over again with different personalities who pretend they are Jeremy, James and Richard. In this case, Chris Evans (!) was there to make a fool of himself, in which he was a pro. Matt LeBlanc was also part of the show, but they didn’t have the chemistry and the show eventually ended up to be a total disaster.
Right now, LeBlanc is trying hard to make the show a success again. Evans left the show after the ratings were decreasing every single episode.
(see: The Grand Tour)