"The public will learn his side of what was an interesting summer for that family.
"They'll learn some things about Meghan and the Markle family that will be shocking, surprising and perhaps change people's opinions on what's gone on."
Tyler, his mother Tracy Dooley, and brother TJ were not invited to the Royal Wedding but travelled to London to appear on a breakfast TV show, which they were dropped from at the last minute.
In the trailer to the explosive new show, Mr Dooley knocks on the door of a huge room in the mansion and asks for his “great-aunt Liz”.
Manners claims the show is less reality and "more of a social experiment."
"But Tyler does present another side to the Markle saga."
Other cast members include the son of a Nigerian chief, the goddaughter of a Russian princess, the daughter of an Irish marquess, an Italian Marquesa, and a triple baroness.