Episode 12

150146 is the twelfth episode and season 1 finale of The Promised Neverland anime. It premiered on March 28, 2019. 150146 is an adaptation of the manga chapter of the same name.

Summary
Isabella sounds the alarm that the children have escaped. The demons are on high alert, and cover the one only exit, the bridge. Thankfully, this has been planned for. Instead of going the obvious route, the children get ready to cross the gorge. Isabella realizes their plan and begins to track them down.

Plot
The children reach and climb the boundary wall. In a flashback, the young boy Phil tells Emma that he suspected the purpose of the farm all along, and accepts that those under four-year-old would stay, as they would be unlikely to be harvested for another two years. She would come back for them then. Meanwhile, Isabella contacts headquarters, notifying them of the fire and that fifteen children have escaped. The alarm is sounded, and the children prepare to cross the channel between the wall and the forest. Don reveals to Ray that he and the children have been practicing at throwing a rope and using a zip line, manages to throw a rope across to a tree in the forest. The children begin to cross the channel. When there is no sign of the children at the bridge, Isabella runs along the wall and arrives in time to see Emma, the last child, cross into the forest before the line is cut. Isabella thinks back to when she was a child in a farm and how she learnt a song from a childhood friend of hers. and watched her friends be harvested. Isabella began training to be a mom and gave birth to a child before becoming the Mom of Plant Three. While there, she hears Ray humming the song she hummed to her baby and realized he was her child. She accepts defeat and wishes them luck before returning to the burning building and telling Phil that they successfully escaped. The escapees see their first sunrise outside the farm.

Anime and Manga Differences

 * The scene where Isabella let her hair down was never shown in the manga.
 * In the anime, Isabella caught up to Emma when the latter was about to zipline across the cliff. In the manga, however, Isabella only managed to reach the spot they escaped from, only to find all of them to have already escaped.
 * Isabella's childhood sweetheart, Leslie, played a Mandolin to perform his song for Isabella. It is different in the manga, as Leslie only sang out the song without any musical instrument.
 * Isabella sang the song alongside Leslie in the manga, whereas in the anime, she only listens.
 * During Leslie's departure from Grace Field, the scene was dragged longer in the anime as compared to the manga. In addition, Isabella was happily bidding him farewell in the manga, but cried as Leslie departed in the anime.
 * An additional scene of Isabella sobbing after Leslie left was added.
 * Scenes of Isabella undergoing training to become a caretaker were added into the anime. The scenes were not present in the manga.
 * When Isabella was pregnant in the manga, she was visibly happy and was singing Leslie's song to her unborn child. In the anime, Isabella appeared to be in a depressed state, and whether or not she had sang the song was vague and unclear.
 * In the manga, a diagram of Artificial insemination was visibly shown, showing how Isabella was impregnated via this method instead of sexual intercourse. In the anime, it was never specified on how she got pregnant.
 * In the anime, Isabella's caretaker, Sarah, had a different hairstyle during her youth.

Trivia

 * The time slot was changed from 12:55am to 1:25am in Japan.
 * Touch off is used as the ending theme for this episode instead of Lamp. The episode is also the first one with no opening theme.