Series synopsis
Underground, also known as Yeraltı is a Turkish drama action & adventure television series that premiered on FOX on January 28, 2026. It was created by Berna Aruz. It stars Deniz Can Aktaş, Uraz Kaygılaroğlu, Devrim Özkan and Sümeyye Aydoğan.
Haydar Ali avenges his family's murder and ends up in prison, where he falls into the orbit of Turkey's most dangerous crime cartel. Recruited by intelligence to dismantle it from within, he must earn the trust of its ruthless boss — a man who becomes his closest ally. Three years later, freedom brings the deadliest complication yet: the woman he never stopped loving is now that same man's wife.
Premise
Haydar Ali avenges his family's murder and ends up in prison, where he falls into the orbit of Turkey's most dangerous crime cartel. Recruited by intelligence to dismantle it from within, he must earn the trust of its ruthless boss — a man who becomes his closest ally. Three years later, freedom brings the deadliest complication yet: the woman he never stopped loving is now that same man's wife.
Premise: Rise up.
Cast and characters
Leading cast
- Deniz Can Aktaş as Haydar Ali
- Uraz Kaygılaroğlu as Bozkurt
- Devrim Özkan as Ceylan
- Sümeyye Aydoğan as Sultan
- Burak Sevinç as Merdan
- Ülkü Hilal Çiftçi as Melek
- Koray Şahinbaş as Efraim
- Hülya Gülşen Irmak as Gülsüm
Supporting cast
- Ekin Mert Daymaz as Ferhat
- Emir Benderlioğlu as Yavuz
- Hakan Çelebi as Paşa
- Nilay Erdönmez as Aslı
- Ceren Kaçar as Yıldız
- Sunay Kurtuluş as Adnan
- Mehmet Yılmaz Ak as Yılmaz
- Ekin Aksoy as Pınar
- Muhammed Cangören
- Sevil Akı Saner as Azize Habban
- Ece Çeşmioğlu as Hülya
- Murat Göçmez
Guest cast
- Murat Göçmez
- Eren Ören as Cihan
Episodes
This series spans 3 seasons with 27 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 0 | 1 | March 4, 2017 | March 4, 2017 |
| Season 1 | 16 | January 28, 2026 | May 20, 2026 |
| Season 2 | 10 | March 8, 2017 | May 10, 2017 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Breaking Free This half-hour special highlights how a daring few broke free from slavery, one of the greatest atrocities in human history, and established a route to freedom that became known as the Underground Railroad. This documentary special tells the stories of the fugitive heroes from Harriet Tubman to William Still and uncovers the inspiration behind creating "Underground." |
March 4, 2017 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Episode 1 The passionate love between Haydar Ali and Ceylan takes an irreversible turn on an unexpected night, placing Haydar Ali at the heart of both the state’s secret plans and Istanbul’s ruthless underworld. Ceylan, determined to protect the man she loves, pushes beyond her own limits, navigating the thin line between innocence and guilt on a dangerous journey. In this world where betrayal, loyalty, and survival instincts are tested, a single wrong step can have deadly consequences for everyone. |
January 28, 2026 |
| 2 |
Episode 2 Haydar Ali being forced into the marriage process with Sultan pushes the conflict with Ceylan to a breaking point, as their tense exchange during the ring purchase reveals that their past love is still an unhealed wound. Ceylan threatens to tell everything to Bozo if Haydar Ali goes through with the marriage, bringing their relationship to the edge. Meanwhile, Bozo anticipates a major upcoming operation, moves his money out of the city, and signals that a huge storm is brewing in the underworld. The intel brought by Merdan about the international team called “Shadow” shows that the threat is no longer confined to the family. The episode ends with Haydar Ali standing at a critical crossroads: he must navigate Bozo’s trust tests while entering an almost irreversible conflict with Ceylan, making the underground war inevitable. |
February 4, 2026 |
| 3 |
Episode 3 While Hamburglu’s proposal is openly discussed within the family, the fact that Bozo is waiting for the “sign that will come from the underworld” gives the sense that the approaching war is only the visible part of something much bigger. On the state front, Aslı cornering Pınar makes the balance even more unstable, while the shadow of the word “betrayal” begins to circulate between Ceylan and Bozo. The unexpected deal that Sultan makes with Haydar Ali and the shocking confrontation experienced during the night ignite the fuse of a rupture that will affect not only two young people, but the fate of two families. |
February 11, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Contraband The remaining members of the Macon 7 have made it North, but they've learned that freedom is not as simple as crossing a line. |
March 8, 2017 |
| 2 |
Things Unsaid As Elizabeth struggles to regain her bearings following her husband's murder, Noah is being taken to his new owner as Rosalee and a group of runaways try to stay one step ahead of Patty Cannon. |
March 15, 2017 |
| 3 |
Ache Unbearable complications threaten to break both Ernestine and Rosalee's will to live. |
March 22, 2017 |
Production
Release
| Original network/platform | FOX |
|---|---|
| First aired | January 28, 2026 |
| Last aired | May 20, 2026 |
| Runtime | 42 minutes |
| Status | continue |
| Schedule | Wednesday at 20:00:00 |