Still of Katie Walder as "Sherry" on 'Mad Men'.

Donielle Artese and Michael Gladis in Mad Men (2007)

Christina Hendricks and Sadie Alexandru in Mad Men (2007)

Jon Hamm, Jared Harris, Christina Hendricks, Vincent Kartheiser, Robert Morse, John Slattery, and Sadie Alexandru in Mad Men (2007)

Jon Hamm, Christina Hendricks, Vincent Kartheiser, Robert Morse, John Slattery, and Sadie Alexandru in Mad Men (2007)

Christina Hendricks, Sadie Alexandru, Beth Hall, Stephanie Drake, and Teyonah Parris in Mad Men (2007)

John Slattery and Alexandra Ella in Mad Men (2007)

Beth Hall with John Slattery at Mad Men Season 5 Premiere

Jon Hamm, Vincent Kartheiser, Jessica Paré, and Rich Sommer in Mad Men (2007)

Elisabeth Moss and Vincent Kartheiser in Mad Men (2007)

Jon Hamm and Anna Osceola in Mad Men (2007)

Christina Hendricks and Aaron Staton in Mad Men (2007)

Bruce Greenwood and Christina Hendricks in Mad Men (2007)

Vincent Kartheiser and Rich Sommer in Mad Men (2007)

Elisabeth Moss and Jay R. Ferguson in Mad Men (2007)

January Jones and Kiernan Shipka in Mad Men (2007)

Jon Hamm and Caity Lotz in Mad Men (2007)

January Jones and Jon Hamm in Mad Men (2007)