المؤسس عثمان - الموسم الاول (2019)

10 or 15 years[b] after the Berke-Hulagu war, Ertuğrul Gazi goes to Konya and he leaves his brother, Dündar Bey, in charge of his tribe. Dündar Bey is easily swain by others into doing their misdeeds, he falls into the trap of the devious Selçuk Sançak Bey, Alişar, and the merciless princess of Kulucahisar, Sofia, who seeks to kill all the Turks. Osman, Dündar's nephew, can see through Alişar and Sofia's plans and warns him about them, despite his refusal to listen. As they continue to build more tension against the Kayı, Geyhatu sends Komutan Balgay to cause more trouble and stop the Kayı, especially Osman, from rebelling against the Mongols.