The trio launched the Amazon Prime series in 2016, after parting ways with Top Gear.
The former Top Gear recently claimed the latest season of Planet Earth is "driving me insane".
The former Top Gear host's column about the Duchess of Sussex was the most complained-about in Ipso history last year.
"This isn't an underdog story, just a confirmation of privilege," one critic wrote.
Reports suggested Clarkson had been axed as host of Who Wants To Be A Millionaire? – although he has since insisted this is not the case.
Comments made by ITV boss Dame Carolyn McCall led to rumours that Clarkson had been "sacked" as host of the game show.
Barrister Charles Streeten shared an open letter with Clarkson after being included in an episode of Clarkson's Farm.
Clarkson's opinion piece about the Duchess of Sussex became the most complained-about article in the regulator's history.
“I wouldn’t have written that," the Grand Tour presenter said, revealing he does not share is co-star's views.
Dame Carolyn McCall said there is "no place on ITV for the comments made in that article".