In Perpetuity is the third episode of the first season of Severance.

Starring
Adam Scott as Mark Scout
Zach Cherry as Dylan George
Britt Lower as Helly Riggs
Tramell Tillman as Seth Milchick
Jen Tullock as Devon Hale
Dichen Lachman as Ms. Casey (credit only)
Michael Chernus as Ricken Hale
with
John Turturro as Irving Bailiff
Christopher Walken as Burt Goodman
and
Patricia Arquette as Harmony Cobel

Guest Starring
Yul Vazquez as Peter Kilmer
Sydney Cole Alexander as Natalie
Michael Cumpsty as Doug Graner
Michael Siberry as Jame Eagan (voice)

Co-starring
Alexis Cofield as Checkout Girl
Alexandra Ferrara as Weather Channel (voice)
Marc Geller as Kier Eagan (voice)
Michael Cruz Kayne as Steven
Jillian Lindig as Myrtle Eagan (voice)
Lou Martini Jr. as Cop (voice)
Mark Kenneth Smaltz as Judd
Claudia Robinson as Felicia

See also: List of Severance Episodes