AMC has expanded the upcoming third season of The Walking Dead, the network announced Saturday.

The cable channel has ordered 16 new episodes for Season 3, up from the six in Season 1 and 13 in Season 2. The hit zombie drama is currently in the middle of its second season, which returns on Sunday, Feb. 12 at 9/8c.

AMC also announced premiere dates for the highly anticipated returns of Mad Men and The Killing. Mad Men, as series star Jon Hamm leaked earlier this month, will return on Sunday, March 25 at 9/8c with a two-hour Season 5 premiere.

The Killing will also kick off its new season with a two-hour premiere, on Sunday, April 1 at 8/7c. (Coincidence that it returns on April Fool's Day? Discuss.) The murder-mystery drama moves to its regular timeslot, 9/8c, the following week.