Lord Carmarthen is a real person portrayed by Bertie Carvel in the TV series John Adams (based on a true story).
In the first episode they appeared in, titled Reunion (season 1), they were 30 years old.
They appear in 1 episodes out of a total of 7 aired
Episodes1
Reunion
episode S1.E4 march 2008Adams is able to secure a loan from the Dutch for his fledgling country as Abigail joins him in France as he helps negotiate the peace treaty.