Early in the Season 2 finale of the acclaimed, much-memed Apple TV+ series “Severance,” a man has a spirited debate that ends up encapsulating much of what keeps the show’s fans watching. The person he is talking to? Himself, via an old video camera. Mark (Adam Scott) records messages for Mark. And Mark replies. Created by the writer Dan Erickson in collaboration with the producer and frequent director Ben Stiller, “Severance,” which was just renewed for another season, is centered on a cultlike company named Lumon that allows employees to “sever” their work lives and their home lives via a chip surgically inserted into their brains. The people who clock in every day — the “innies” — have no idea what their “outies” do after quitting time, and vice versa. At the end of Season 1, Mark’s innie led his office-mates Dylan (Zach Cherry), Helly (Britt Lower) and Irving (John Turturro) in a mini-rebellion, executing “the overtime contingency,” which allowed them all, very briefly, to live their outies’ lives. This is how Mark learned that his outie’s wife Gemma (Dichen Lachman) — presumed dead in the outside world — was still alive as an innie at Lumon. Season 2 has been primarily driven by outie Mark’s efforts to reintegrate his consciousness with innie Mark, in hopes of rescuing Gemma from Lumon. In the finale, the two Marks argue over whose needs are more important: If Gemma leaves Lumon, will outie Mark terminate his employment there — and in the process terminate innie Mark?