Passenger turns out to be a bunch of clues in a trench coat, hoping to find themselves a mystery as the series finale collapses in on itself for want of a there there.
A dangerous game is afoot in Chadder Vale at Passenger's midpoint. Mehmet is dead, and Riya – who has never claimed to be perfect and spends a not-inconsiderable amount of time showing us some of those imperfections – refuses to let it go.