VIDEO: First Look - MAD MEN's 'What is Happiness?' Season 6 Teaser

Below, check out an all-new teaser for AMC's sixth season of Mad Men which asks, 'What is Happiness?" The series returns on Sunday, April 7 at 9:00 pm ET/PT.

The special two-hour Mad Men premiere was written by creator and executive producer, Matthew Weiner and directed by executive producer, Scott Hornbacher. Following the premiere, "Mad Men" will return to its regular timeslot at 10pm ET/PT on Sunday April 14 with an episode written by Jonathan Igla and Weiner, and directed by Jon Hamm.

Created by Emmy and Golden Globe-winning executive producer Matthew Weiner and produced by Lionsgate, Mad Men has riveted audiences with the seductive and intriguing world of Sterling Cooper Draper Pryce. This season, the series' Breakout ensemble cast continues to captivate as they grapple with an uncertain new reality.