UPDATED: During its portion of TCA, AMC confirmed that the fifth season of Mad Men will debut on March 25. (Star Jon Hamm had let the date slip in an interview late last week.) But in a twist, the Emmy-winning 1960s drama will open Season 5 with a two-hour premiere for the first time in its run. The network also announced that The Killing‘s second season will kick off on April 1, the date of the second season premiere of HBO’s Game Of Thrones. What’s more, after enduring the wrath of fans over closing the show’s first season without solving the murder at its center, AMC’s SVP original programming Joel Stillerman assured critics that won’t happen again in Season 2. “I can stand here and confirm that we heard everyone, and the killer will be revealed in the Season 2 finale of The Killing,” he said. “We explored veering away from the original Danish model (following the controversy). At the end of the day, after significant discussion, we decided that resolving the murder at the end of Season 2 was the best plan.”

Additionally, AMC said that the upcoming third season of The Walking Dead will consist of 16 episodes, up from 6 episodes in Season 1 and 13 in Season 2.  The zombie drama’s sophomore season continues on Feb. 12, paired with Kevin Smith’s six-part docu series Comic Book Men. As for AMC’s other returning series, Breaking Bad will be back in the third quarter and Season 3 of Walking Dead will launch in the fourth quarter, along with Season 2 of Hell On Wheels.

Ray Richmond is contributing to Deadline’s TCA coverage.