Eren starts to question himself about whether he can actually lift the boulder in Titan form. Pixis chooses an elite group of fighters to protect Eren while he attempts to block the hole, Mikasa gets chosen to help support the elite group, while Armin helps with the decoy.
The elite group and Eren start to run around the side of Trost to get closer to the boulder, jumping down and using there ODM gear to fly between the buildings. As Eren gets closer, he leaps into the air and bites down on his hand as before and transforms.
Finishing his transformation, Eren stands there in Titan form, before turning around and punching the place where Mikasa stood on the rooftop, destroying his hand, ending the episode.
After catching up with what's happened so far, before the opening credits, episode 12 returns to Eren trying to kill Mikasa.
Mikasa jumps onto Eren and tries to make him gain his senses back, as something is wrong with him. Eren then decides to try and kill Mikasa, who is on his face, but she moves, causing him to destroy half of his face and collapse beside the bolder, slouching, not moving or healing.
One of the soldiers in the elite group, sends up a red flare decalring the mission a failure.
In the far corner, Armin sees the red smoke and decides to rush around to see what went wrong, while Armin runs to see what's wrong with Mikasa. The elite soldiers argue about what to do next, as three Titans close in on them slowly.
After deciding it's best to protect Eren untill he can be recovered from inside the Titan body, the soldiers split, to take out the advancing Titans. Armin finally makes it to Eren and lands on the lifeless Titan, he calls to Mikasa asking what went wrong and she explains.
Telling Mikasa to keep protecting Eren, Armin decides to try and get to Eren, or try and wake him up by driving his sword through the back of the Titan body's neck, which slices through Eren's arm, causing Eren to scream, which is replicated through the Titan.
Eren is in a dream-like state from when he was younger and thinks everything is okay, when Armin starts banging on the window telling him to get up. Eren is confused in his dream to start with, but slowly begins to remember what is going on and what he's got to do. Eren wakes up and stands up in titan form, screaming and healing his wounds.
During all this, Jean and some of the other cadets are sent out to pick off the stray Titans that are walking away from the wall. After saving Connie from a titan, Jean's ODM gear malfunctions and he has to run from two Titans, finding shelter in a house. Looking out the window, Jean spots an ODM gear on a fallen solider nearby and decides he will try and retrieve it to get to safety.
Episode 13 begins with Jean making a break for the ODM gear, the Titan that was after Jean comes back and Marco flies down and distracts the Titan while Connie and Annie fly down and help Jean.
We then Join Eren, with the giant bolder on his back, steaming from constantly having to heal while carrying it, slowly making his way towards the breach. When the other elite soldiers see Eren making his way, they revert back to the old plan and move out to protect him. Losing the Titans interest, the solders go down on foot to regain it as they are after Eren.
Eren begins to feel like he can't hold the boulder anymore but motivates himself with his dream of making it to the outside world. The solider and Mikasa take out a Titan on the bridge in front of the breach, allowing Eren to get to it and slam the bolder into the breach sealing it closed, Eren then collapses again.
The solider with the flare gun, shoots yellow into the air letting commander Pixis know the mission succeeded.
Armin fights to free Eren from the corpse of the Titan as a Titan makes its way towards them. After finally getting free, Armin falls down with Eren and the Titan nearly gets them, before a flash of light beams accross in front of them, and a figure lands on the fallen Titan. Eren partly continues, looks at the figure and sees the insignia on the cloak.