The Last of Us Season 2, episode 4: Who is Isaac?

Joel may have left us, but new faces are arriving in The Last of Us universe to take his place.

Episode 4 saw yet more new arrivals, one of which marks the first onscreen appearance for a character who is briefly mentioned right at the beginning of the season.

So who is Isaac (Jeffrey Wright), and what part is he going to play in the action going forward? Let's unpack it.

SEE ALSO: 'The Last of Us' Season 2: What are the differences between the game and the HBO show?