The episode is neatly split between Mark's work and personal lives:

In the premiere episode of Apple TV's Severance , titled the series introduces a chilling corporate reality where employees surgically divide their memories between work and home. Directed by Ben Stiller, the episode sets a disorienting tone through sterile, symmetrical cinematography that emphasizes the isolation of its protagonist, Mark Scout. The Duality of Mark Scout

Inside Lumon Industries, Mark is an efficient employee recently promoted to department head of Macrodata Refinement (MDR) following the mysterious departure of his best friend, Petey.