"Not Tomorrow Yet" is the twelfth episode of the sixth season of the post-apocalyptic horror television series The Walking Dead, which aired on AMC on March 6, 2016. The episode was written by Seth Hoffman and directed by Greg Nicotero.

While foraging in the woods, Carol kills a walker that dramatically recomposes her appearance before making and distributing acorn and beet cookies to the children and her friends in Alexandria. She is shaken when Rick returns saying they will have to fight, and visits Sam Anderson's grave. Morgan finds her there and asks why they haven't talked since they fought in the basement several weeks ago. It turns out that Carol convinced Denise, Eugene, Tara and Rosita to keep quiet about the incident, on the pretense of protecting Denise, though Carol seems less certain now about who it is that she's protecting. Carol leaves a cookie on Sam's grave, troubled over who is going to die next.

Rick calls a meeting and lays out the deal with the Hilltop and explains how the Saviors nearly killed Sasha, Abraham, and Daryl, and it would only be a matter of time before they found Alexandria. Morgan proposes that stating their willingness to fight might be enough to stop the Saviors, but Rick disagrees and won't give up the initiative, preferring to make a pre-emptive sneak attack against the Saviors and kill them all.

Sleepless that night, Carol opens a diary which seems to be a list of the people she has killed: Ryan Samuels; Karen; David; Lizzie; approximately seven at Terminus; and seven Wolves. She totals it to 18 lives taken, circling the number as it weighs on her conscience. Carol walks aimlessly, smoking again, and finds Tobin also restless. Tobin admits that Carol can do things that terrify him, and says that she's still a mom, that she has that strength toward most of the people in Alexandria, but she means something else to him. She kisses him.

Maggie and Glenn are worried, too. As negotiator for the deal Maggie feels she has a moral imperative to see it through, though she suggests she takes a perimeter position keeping watch.

Abraham takes the opportunity of the trip to pack up and move out, leaving Rosita, saying that "it happens." She demands answers and Abraham admits that when they met he thought she was the last woman on earth — but she isn't. As Abraham walks out, Eugene is unable to console Rosita. Later, still fuming about the breakup, Rosita complains to Carol about Morgan having the nerve to make waves at the meeting, but she agrees with Carol not to tell.

Rick, Glenn, Maggie, and Daryl strategize with Andy, a Hilltop scout, on attacking the building they believe to be the Saviors' stronghold. They plan to arrive at night, on the ruse that they are delivering Gregory's head to gain admittance to the building, and seize the room they believe to be the armory. To facilitate this, Glenn and Heath kill some walkers, looking for a stand-in for Gregory's head, and talk about having to kill another person for the first time. Rick, Jesus, and Andy pick from among three heads, and after Rick breaks the nose of one, Andy says that the Saviors are scary but they've got nothing on Rick.

They arrive at a facility with two enormous radio dishes. Andy plays his role cowing to the two Savior sentries as he brings the head, and succeeds in fooling them. One of them is killed by Daryl and when the second returns with hostage Craig, Michonne kills him before he notices anything amiss. Operating in pairs, Rick and Daryl, Abraham and Sasha, Glenn and Heath, and Rosita and Aaron infiltrate the building with Michonne in reserve. They begin a systematic room-by-room search for the armory, murdering any sleeping men as they are encountered. After committing his first human kill with Heath, Glenn finds a wall decorated with 20 polaroids of headshot wounds, reminiscent of a serial killer's trophies.