Diriliş: Ertuğrul season 4

The fourth season of the Turkish TV series, Diriliş: Ertuğrul, created by Mehmet Bozdağ, succeeds the third season and precedes the fifth and final season of Diriliş: Ertuğrul. The fourth season of the historical drama television series premiered on 25 October 2017 and concluded on 6 June 2018.

Plot
It is believed that Ertuğrul is dead despite the truth being that he is actually captured by some slave traders. Meanwhile, Emir Sadettin convinces Dündar, Ertuğrul's brother and the new Kayı Bey, into selling Hanlı Pazar and moving back to Gündoğdu's tribe but is stopped upon Ertuğrul's return and is forthwith banished. After Ertuğrul's son, Gündüz, is kidnapped, Ertuğrul declares war against Karacahisar and is successful in conquering it. Following Ares' capture, Ertuğrul takes him to the Sultan and tells him to confess to the Sultan about Sadettin Köpek's misdeeds. The plan nearly works but Köpek is saved by the Sultan's wife, Mahperi Hatun and leads to an event turning Tekfur Ares, later killed by Noyan, into a Muslim. Soon after that, the Sultan is killed and Köpek's increase in power in the palace creates problems for the new Sultan, Gıyaseddin. Gıyaseddin allies with Ertuğrul and with the help of Hüsamettin Karaca, Köpek is beheaded. After this, Ertuğrul faces the return of Noyan but is successful in defeating him and his devious sister, Alangoya, who attempted to kill Ertuğrul's son, Osman, who was born on the same day as his mother's death. Noyan prepares for a battle, historically known as the Battle of Köse Dağ and the Kayı move to Söğüt.

Main characters

 * Engin Altan Düzyatan as Ertuğrul Bey
 * Hülya Darcan as Hayme Ana
 * Esra Bilgiç as Halime Hatun
 * Cengiz Coşkun as Turgut Alp
 * Nurettin Sönmez as Bamsı Beyrek
 * Murat Garipağaoğlu as Sadettin Köpek
 * Burak Dakak as Sultan Gıyaseddin Keyhüsrev
 * Cemal Hünal as Tekfur Ares / Ahmet Alp

Supporting characters

 * Gülsim Ali as Aslıhan Hatun
 * Burçin Abdullah as Hafsa Hatun
 * Ayberk Pekcan as Artuk Bey
 * Ozman Sirgood as İbn-i Arabi
 * Burak Hakkı as Sultan Alaeddin Keykubat
 * Engin Öztürk as Günalp Bey
 * Ertuğrul Postoğlu as Bahadır Bey
 * Ogün Kaptanoğlu as Titan
 * Sinem Öztürk as Mahperi Hatun
 * Barış Bağcı as Baycu Noyan
 * Sezgin Erdemir as Sungurtekin Bey
 * Batuhan Karacakaya as Dündar Bey

Minor characters

 * Sera Tokdemir as Marya
 * Melih Özdoğan as Samsa Alp
 * Celal Al as Abdurrhahman Alp
 * Edip Zeydan as Dumrul Alp
 * Hasan Küçükçetin as Atabey Şemseddin Altun Aba
 * Orhan Kılıç as Atsiz Bey
 * Arda Öziri as Göktug
 * Ergun Taş as Aziz
 * Hakan Serim as Günkut Alp
 * Yaman Tümen as Gündüz Alp
 * Hakan Bozyiğit as Komutan Kostas
 * Aslıhan Güner as Karaca Hatun
 * Gürbey İleri as Sancar Bey
 * Beyzanur Mete as Alçiçek Hatun
 * Hakan Onat as Komutan Angelos
 * Melikşah Özen as Melikşah Alp

Guest characters

 * Serdar Gökhan as Süleyman Şah
 * Gönül Nagiyeva as Alangoya (spies under the name Almıla Hatun)
 * Burak Demir as Hüsamettin Karaca
 * Oya Unustası as Sügay Hatun
 * Ali Bühara Mete as Mergen (disguised as Eynece)
 * Hasan Şahintürk as Tekfur Kritos
 * Mert Soyyer as Aleko
 * Levent Sülün as Simko
 * Alper Atak as Antheus
 * Merve Kızıl as Esma Hatun
 * Sezanur Sözer as Eftalya
 * Kaan Çakır as Ögedei Han