One of the pleasures of TV is duration. You spend hours and hours with a group of characters, allowing for viewer-character relationships that can change dramatically over time. Few shows demonstrate the power of this better than Matthew Weiner's Mad Men.

In the most reason season, we've seen things from Trudy Campbell (Alison Brie) that shocked viewers, had them standing up and applauding. But how did Mad Men turn Trudy into such a complex character? Let's start from the beginning, and trace the Evolution of Trudy Campbell, Business Housewife.

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Written by Ross Scarano (@RossScarano)