2026 · Drama, Action & Adventure · 8.2/10 (12 votes) · 2 seasons · 19 episodes · Returning Series
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.
Created by Berna Aruz
Genres: Drama, Action & Adventure
Language: Turkish
Country: Turkey
Network: MEDYAPIM
Original title: Yeraltı
Enjoy Underground? Explore more in these genres: Drama, Action & Adventure. Every title on FluxEntertainment streams free in HD with no sign-up required.
Stream Underground free online in full HD on FluxEntertainment. Choose from multiple streaming servers for reliable playback. Multi-language subtitles are available in English, Spanish, French, Arabic, Hindi, Turkish, German, Italian, Portuguese, Russian, Japanese, Korean, Chinese and Indonesian. No sign-up or subscription required — just press play and enjoy.
Underground is a 2026 drama, action & adventure series rated 8.2 out of 10 by 12 viewers on TMDB. The series follows: 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.
On FluxEntertainment you can watch Underground in high definition quality with no buffering. Switch between multiple video servers if one is slow or unavailable. Each episode is available in full and streams instantly with no download needed. FluxEntertainment is the best place to watch Underground online for free.