Prop master Sean Mannion reveals in the book "Agent Carter Season One Declassified" that the blinding device that Peggy uses is never seen clearly because the prop was accidentally dropped and fell two stories down during rehearsal, breaking into thirty pieces.
Angie mentions auditioning for the part of Betty Carver in The Captain America Adventure Program. The writers had originally planned for her to get the part, and the radio show being an even larger part of the series.
A "Hidden Mickey" is formed by three circles around newspaper want ads; the series is, of course, produced by Marvel, which is owned by Disney.
When Thompson and Dooley are driving to New Jersey, Dooley was supposed be reading through files in the passenger seat, but actor Shea Whigham wanted to express that his character gets very little sleep because of his job, and proposed that Dooley would take a nap with his hat cocked slightly over his face.
The form Peggy looks at while inspecting the dairy trucks, lists three British products: PG Tips (a brand of tea), HP Sauce (a brown sauce condiment in the same category as Worcestershire or A1), and digestives (a specific sort of cookie).