Title: Those Who Meet Must Part 「会うは別れの始め」 (Au wa Wakare no Hajime)
Japanese Date Aired: 26 March 2016
English Date Aired: 31 May 2016
Narrated by Mikado Ryuugamine.
"I'm going to bring an end to the Dollars along with myself."
As Mikado makes up his mind, a shot rings out across the night sky in Ikebukuro. For Izaya and Shizuo, too, wounded from head to toe, the time has come for their final showdown. And now that Celty has lost all of her memories of her life in Ikebukuro, what course of action does Shinra take? This story of a boy who yearned to lead an extraordinary life - a twisted love story - is about to reach its final act!
adapted from what manga or LN chapter?
references to previous episodes?
In order of appearance (not including OP)