Where can I watch “Underground” Season 1 Episode 1 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

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Watching earlier episodes in season 1 helps you follow the plot and character arcs leading into this episode.

Watch Underground Season 1 Episode 1 Online

“Episode 1” — Watch "Underground" Season 1 Episode 1 online in HD for free. Check streaming providers, cast, and episode details.

Jan 28, 2026 Season 1 Episode 1 146 min

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Underground Season 1

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Season 1 Episode 1 — Aired on Jan 28, 2026 • runs about 146 minutes.

Notable cast/guest names in this episode include Deniz Can Aktaş, Uraz Kaygılaroğlu, Devrim Özkan, Sümeyye Aydoğan.

This page includes 1 official still(s) (when available) plus legal availability links.

Looking for “watch Underground Season 1 Episode 1 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

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.