Collaborators

Overview

While Don continues his affair with Sylvia, Pete's latest infidelity threatens his marriage. Meanwhile, Peggy's icy relationship with her new staff continues, but she also gets an unlikely tip on a potential new client.

Guest Stars

Linda Cardellini

Sylvia Rosen

Brian Markinson

Arnold Rosen

Stephanie Drake

Meredith

Katie Walder

Sherry

Brandon Killham

Young Dick Whitman

Brynn Horrocks

Abigail Whitman

Morgan Rusler

Mack Johnson

Megan Ferguson

Aimee/Amy Swenson