Underground

Name: Underground
Released: 2026-01-01
Rating: 7.7

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... View More View Less

Watch Underground (2026) TV Series Online Free HD – All Episodes

Watch Underground (2026) full TV series online in high-definition quality for free on Cineby. Stream all seasons and episodes with no signup required. 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.

Underground TV Series Information

Title	Underground
First Aired	2026
Genre	Drama, Action & Adventure
Creator	Berna Aruz
Cast	Deniz Can Aktaş, Uraz Kaygılaroğlu, Devrim Özkan, Sümeyye Aydoğan, Burak Sevinç
Seasons	1 Season
Episodes	18 Episodes
Country	Turkey
Status	Returning Series
Rating	⭐ 7.7 / 10
Quality	HD 1080p
Language	English

Why Watch Underground on Cineby?

Cineby provides the best free streaming experience for Underground with all 1 season available, multiple fast servers, and HD quality — all completely free.

HD Quality: Watch all episodes in full 1080p high-definition clarity
All Seasons Available: Stream every season and episode of Underground in one place
Multiple Servers: 30+ streaming server options for uninterrupted playback
Free to Watch: No subscription, no credit card, no hidden fees ever
No Registration: Start watching any episode instantly without creating an account
All Devices: Works perfectly on mobile, tablet, laptop, and desktop
Episode Navigation: Easy episode and season selector to jump to any part

How to Watch Underground Online

Streaming Underground on Cineby is simple and fast:

Select your desired season from the season dropdown on the left
Click any episode from the episode list to start watching
The video loads automatically on the default server
If a server is slow or not working, click any other server button above
Use the Previous / Next buttons to move between episodes easily
Enjoy Underground in HD quality for free!

About Underground

Underground is a Drama, Action & Adventure TV series that premiered in 2026, created by Berna Aruz, and starring Deniz Can Aktaş, Uraz Kaygılaroğlu, Devrim Özkan. The series has 1 season with a total of 18 episodes. It holds a rating of 7.7/10 based on audience reviews. Current status: Returning Series.

Frequently Asked Questions

Is Underground free to watch?

Yes! All episodes of Underground are completely free to watch on Cineby. No subscription or payment is required.

How many seasons of Underground are available?

All 1 season of Underground (18 total episodes) are available to stream for free on Cineby.

What quality is Underground streamed in?

We stream Underground in HD 1080p quality. The actual playback quality may vary depending on your internet connection speed.

Can I watch Underground on my phone?

Yes! Underground works perfectly on all devices including Android, iPhone, iPad, and any desktop browser — no app download needed.

What if a server is not working for Underground?

We provide 30+ streaming servers for every episode of Underground. Simply click a different server button above to switch instantly.

Where can I download Underground episodes?

Click the Download button above to access download options for any episode of Underground in multiple quality formats.