Severance · A Viewer's Companion
Half family tree, half identity map — because everyone on the severed floor is two people.
A chip in the head splits every “severed” worker into an office self (the innie) and a home self (the outie) who have never met. This chart holds both halves still: cyan is Eagan blood, the dynasty that owns Lumon; fluorescent white is the severed, whose cards carry both names and a half-moon badge; steel blue is unsevered management; and warm amber is the outie world — the spouses and siblings who only ever meet half a person.
Why it's confusing: the five facts that unlock the show
Severance's whole trick is that the cast list is nearly twice as long as the number of bodies. These are the load-bearing reveals.
One chip, two lives
The severance chip splits memory at the elevator. At work you're an innie who has never seen the sky; at home you're an outie who has never seen your desk. Neither remembers being the other — so every severed character is effectively two people who share a body and can be lied to separately.
From Kier to Helly, blood runs the company
Kier Eagan founded Lumon in the 1860s, and the CEO chair has passed through seven Eagans — never leaving the family — down to Jame. His daughter Helena volunteered to be severed as a PR stunt, and her innie Helly R. promptly became the severed floor's fiercest rebel. Heiress upstairs, insurgent downstairs, one body.
Ms. Casey is Gemma
Mark severed to escape grief: his wife Gemma “died” in a car crash. But the placid wellness counselor comforting his innie, Ms. Casey, is Gemma — alive, held on Lumon's hidden testing floor. Outie Mark mourns a woman his innie sees every week, and neither of them knows it.
Cobel, Selvig, and the inventor
Patricia Arquette plays one unsevered woman with three lives: Harmony Cobel, manager of the severed floor; “Mrs. Selvig”, the sweet neighbor spying on Mark's home life; and — Season 2's reveal — the actual inventor of the severance procedure, whose credit Jame Eagan took for the family.
You can only marry half a person
Every marriage on the chart lives in the outie world — and severance cuts each one in half. Gretchen is married to outie Dylan but falls for his sweeter innie. Fields has been with Burt for decades, though Burt's innie knows none of it and loves Irving instead. And Mark's marriage to Gemma persists on both sides of the wall without either half knowing.
Cold Harbor
The numbers Mark S. sorts all season aren't busywork: each completed file corresponds to a new innie implanted in Gemma on the testing floor. Cold Harbor is her 25th and final file — when it hits 100%, Lumon is finished with her. In the finale Mark S. completes it, breaks Gemma out… and then chooses to stay behind with Helly.
The name decoder
Same face, different name — that's the point. Keep these pairs apart and the show snaps into focus:
Helly R. vs. Helena Eagan
One body. Helly R. is the innie — red-haired rebel of MDR, in love with Mark S. Helena is the outie — Eagan heiress who later impersonates her own innie on the severed floor. Helly's “R.” was part of the cover story.
Mark S. vs. Mark Scout
Mark S. leads Macrodata Refinement and slowly wakes up to Lumon's lies. Mark Scout is a grieving ex-history-professor who severed to skip eight hours of pain a day. In Season 2 they argue by camcorder — the show's best double act is one actor.
Ms. Casey vs. Gemma Scout
Ms. Casey is the eerily calm wellness director. Gemma is Mark's “dead” wife. Same woman: Lumon staged the crash and keeps her below the severed floor, cycling her through test innies — Ms. Casey is just one of about 25.
Harmony Cobel vs. Mrs. Selvig
Not severed — Cobel remembers everything and simply pretends to be “Mrs. Selvig,” Mark's next-door neighbor and Devon's lactation consultant. One woman, running surveillance on both of Mark's lives at once.
Kier the man vs. Kier the town
Kier Eagan is Lumon's long-dead founder-prophet, quoted like scripture. Kier, PE is the company town everyone lives in, named for him. When characters say “Kier,” check whether they're praying or giving directions.
The innie initials
Mark S. = Scout. Dylan G. = George. Irving B. = Bailiff. The letter is just the outie surname — which is why Helly R. should worry you: there is no Eagan whose name starts with R.
The Board vs. Natalie
The Board is Lumon's unseen, unheard authority — it “speaks” only through an earpiece. Natalie Kalen is the composed spokeswoman who relays its words with a fixed smile. You never hear the Board directly; you only ever hear Natalie.
MDR vs. O&D
Macrodata Refinement is Mark's four-desk department; Optics & Design is Burt and Felicia's. Lumon fed each department horror stories about the other — a small preview of how the company rules everyone: by making sure no one can compare notes.
Not on the tree — but pulling its strings
Petey Kilmer †
Mark's innie best friend and MDR's old chief. First to undo his severance through “reintegration” — he finds outie Mark, warns him about Lumon, and dies of the after-effects. His death starts the whole story.
Asal Reghabi
Rogue ex-Lumon surgeon who reintegrated Petey — and killed security chief Graner. In Season 2 she works from Mark's basement, half-merging his two selves.
Mr. Drummond †
Lumon's hulking executive-enforcer, answerable to Jame himself: he oversees the testing floor, the goats, and the Cold Harbor push — and doesn't survive its final night.
Felicia
Burt's gentle colleague in Optics & Design — keeper of its secrets, and the one who grieves down there when Burt is “retired.”
A note on the portraits: stills from the Severance wiki, cropped and served from this site so nothing hotlinks an external host. Kier appears as Lumon itself depicts him — as an effigy. Chart and text cover the story through the end of Season 2 (“Cold Harbor,” March 2025) — spoilers to there, none beyond.