Death Note: Desu nôto - Season 1 Episode 10

Light and the task force attempt to ambush Himura's group and rescue Sayu by pretending to exchange the notebook for her life. However, Mello, Near's ambitious alter-ego, awakens and takes over Near. Mello appears during the ambush and reveals himself to be the leader of Himura's group. Though Sayu is rescued, the notebook falls into Himura's possession. At the task force headquarters, Light discovers the name of one of the kidnappers, Mason Fujiyama, and uses him to reveal the real names of the other kidnappers. Light uses the information to plan a second ambush at Mello's hideout, leading to the latter's incarceration. However, Mello escapes from confinement before his real name can be exposed by Mikami. Later, Light uses Himura's real name, Halle Lidner, to manipulate her into returning the notebook to him. Soichiro, who has been keeping an eye on Light as per L's request, witnesses Light regaining the notebook. He confronts Light and after failing to convince him to give up the mantle of Kira, commits suicide by writing his own name in the notebook. Meanwhile, Lidner, influenced by the Death Note, carries out a suicide bombing at Mello's new hideout.