114.
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Jon Hamm - Don Draper (65 episodes, 2007-2012)
Elisabeth Moss - Peggy Olson (65 episodes, 2007-2012)
Vincent Kartheiser - Pete Campbell (65 episodes, 2007-2012)
Christina Hendricks - Joan Harris (65 episodes, 2007-2012)
Aaron Staton - Ken Cosgrove (65 episodes, 2007-2012)
Rich Sommer - Harry Crane (65 episodes, 2007-2012)
January Jones - Betty Draper (64 episodes, 2007-2012)
John Slattery - Roger Sterling (62 episodes, 2007-2012)
Kiernan Shipka - Sally Draper (61 episodes, 2007-2012)
Robert Morse - Bertram Cooper (53 episodes, 2007-2012)
Michael Gladis - Paul Kinsey (40 episodes, 2007-2012)
Bryan Batt - Salvatore Romano (39 episodes, 2007-2009)
Jared Harris - Lane Pryce (35 episodes, 2009-2012)
Alison Brie - Trudy Campbell (29 episodes, 2007-2012)
--spoiler--