Yes, that's Mark. It also looked like he's bulked up a bit. It's kind of funny that he's been on the show for so long but we don't really know much about his character. Vera assigns him tasks and he returns with information. I'm fine with the secondary characters not having much in the way of subplots, but it doesn't seem like he has much of a personality either.
Speaking of secondary characters, I've noticed a few former regulars popping up in interesting projects: Kingsley Ben-Adir (The OA, High Fidelity, Marvel's Secret Invasion series), Sonya Cassidy (Lodge 49, the upcoming The Man Wh