Title: All in the Same Boat 「同舟相救う」 (Doushuuai Sukuu)
Japanese Date Aired: 23 January 2016
English Date Aired: 29 March 2016
Thanks to a certain young girl, the existence of a head has been exposed to the public. It heralds the beginning of a situation that neither Celty nor Izaya, nor anyone involved with that head, could have foreseen. The city of Ikebukuro is in shock. Face-to-face with this extraordinary turn of events, Mikado discovers what’s in his own heart. Meanwhile, Haruna Niekawa approaches Anri in order to find the object of her desire, Takashi Nasujima, and proposes that they join forces. But…
adapted from what manga or LN chapter?
references to previous episodes?
In order of appearance (not including OP)