Mark is promoted to lead a team who've had their memories surgically divided between their work and personal lives.

The team train new hire Helly on macrodata refinement. Mark takes a day off to meet with a mysterious former colleague.

Mark takes the team on a field trip, but Helly continues to rebel. A deteriorating Petey struggles to tell Mark about Lumon’s misdeeds.

Irving finds an intriguing book at work. Helly aggressively pursues a meeting with her Outie. Mark attends a funeral with Ms. Selvig.

Irving and Dylan confront Burt about his lies. Mark and Helly discover a strange new department.

The team angers Cobel by forming an alliance.

The team prepares a plan. Mark attends Devon and Ricken’s party.

The team discovers troubling revelations.

Mark returns to work under different circumstances. Secrets from the Outie world come to light.

Mark contemplates the meaning of a message.

Mark, Helly, Irving, and Dylan search for answers.

The team participates in a group activity.

Tensions emerge after the team suffers a loss.

Bonds are tested. Mark continues on his path of discovery.

An old romance intersects with a deadly present threat.

Discoveries are made.

Mark and Devon team with an ally. Helly investigates further.

Mark forms a shaky alliance in an all-or-nothing play, while the team makes a dangerous last stand.