Attack on Titan season 3 episode 15 Descent
As Bertholdt waits in his hiding place, he thinks back to the Battle of Trost where he and the others were forced to leave a defenseless Marcoh to be eaten by Titans after he overheard him and Reiner discussing a strategy to stop Eren plugging the hole in the wall. Bertholdt then recalls himself and Reiner meeting with War Chief Zeke in Shiganshina some time before the Survey Corps arrive, with Reiner criticizing his friend's lack of commitment. Back in the present, the Armored Titan lets out a roar, signalling the Beast Titan to throw a barrel containing Bertholdt into Shiganshina. Seeing Reiner down, hoping his friend can hear him, Bertholdt does not immediately transform and instead confronts the Scouts. Armin attempts to negotiate with him, but Bertholdt reveals to have found his resolution and intends to kill everyone before swinging himself high into the sky to transform into the Colossal Titan, creating a massive fiery explosion. With the fate of Hange and her group ambiguous, Armin is hesitates over attempting an attack or retreat as the Colossal Titan begins to advance towards the inner wall.