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RTS Un5.0(1)

Sial IV

Sci-Fi & FantasyMystery
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We checked 8 streaming services in India on 04 Jun 2026 at 15:30 IST

1969
1 Season
4 Episodes
FR
Ended

About

Sial IV is a Swiss television miniseries by Greek filmmaker and writer Adonis Kyrou, adapted from the speculative fiction novel Deadly Image (AKA The Uncertain Midnight) by British author Edmund Cooper. It tells the story of Denis Lange (Henri Gilabert), a fallout shelter engineer who is accidentally trapped in suspended animation as war breaks out in 1970, only to awaken in the early 2100s in Sial IV, an underground city in which humankind lives a life of leisure, having discharged all responsibility to androids. Assigned the android Diana as his personal assistant, Denis ventures through this unsettling idyll, eventually finding a small but tenacious group of resistors who seek to uncover the truth about the compound and its ruler, the mysterious Machiavelli.

Cast

Where does Sial IV rank today?

Sial IV is #10000 on the Bowood.TV Daily Streaming Charts today.

  • Highest: #10000
  • Top 10: 0 days
  • Top 100: 0 days

Watch Sial IV Online Free — All Episodes in HD

Stream Sial IV online free in HD on Bowood.TV. A talked-about sci-fi & fantasy and mystery series originally produced in French and released in 1969, it's earned a solid 5.0/10 from 1 viewers worldwide.

About Sial IV

Sial IV is a Swiss television miniseries by Greek filmmaker and writer Adonis Kyrou, adapted from the speculative fiction novel Deadly Image (AKA The Uncertain Midnight) by British author Edmund Cooper. It tells the story of Denis Lange (Henri Gilabert), a fallout shelter engineer who is accidentally trapped in suspended animation as war breaks out in 1970, only to awaken in the early 2100s in Sial IV, an underground city in which humankind lives a life of leisure, having discharged all responsibility to androids. Assigned the android Diana as his personal assistant, Denis ventures through this unsettling idyll, eventually finding a small but tenacious group of resistors who seek to uncover the truth about the compound and its ruler, the mysterious Machiavelli. Across 1 season and 4 episodes, originally airing on RTS Un.

Sial IV Cast and Characters

The cast features Lise Lachenal (as Diana), François Chodat (as Tibère), Claude Cerval (as Nathanaël de Geoffroy), Henri Gilabert (as Denis Lange), and Marcel Dalio (as Machiavel). Their performances are a major reason Sial IV has built such a passionate audience.

Where to Watch Sial IV Online

On Bowood.TV you can watch Sial IV free — no account, no credit card, no ads in the middle of the show. We stream the full series in 720p / 1080p HD, with subtitles when available, on any device: phone, tablet, laptop, or smart TV browser.

▶ Watch Sial IV Now

Why People Are Watching Sial IV

Sial IV flies under the radar but it deserves your attention. What makes it work is tight pacing that earns its twists and world-building that respects the audience's intelligence. If you enjoy French storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.

Frequently Asked Questions about Sial IV

Where can I watch Sial IV online for free?

You can watch Sial IV online free on Bowood.TV. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.

How many episodes does Sial IV have?

Sial IV has 4 episodes across 1 season. All episodes are available to stream right here on Bowood.TV.

Is Sial IV good? What's the rating?

Sial IV holds a 5.0/10 rating based on 1 reviews — a niche pick worth checking out.

Who is in the cast of Sial IV?

The main cast includes Lise Lachenal, François Chodat, Claude Cerval, and Henri Gilabert, plus a strong supporting ensemble.

Is Sial IV available in French?

Yes — Sial IV was originally produced in French and that's the version you'll stream here on Bowood.TV. English subtitles are provided when available.

When was Sial IV released?

Sial IV first aired in 1969.

Do I need an account to watch Sial IV on Bowood.TV?

No. Bowood.TV is free and you can watch Sial IV without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.

Frequently Asked Questions

Where can I watch Sial IV for free?

You can watch Sial IV online for free on Bowood.TV. All 4 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.

How many seasons and episodes does Sial IV have?

Sial IV currently has 1 season and a total of 4 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on Bowood.TV and continue watching from where you left off.

What is Sial IV about?

Sial IV is a Swiss television miniseries by Greek filmmaker and writer Adonis Kyrou, adapted from the speculative fiction novel Deadly Image (AKA The Uncertain Midnight) by British author Edmund Cooper. It tells the story of Denis Lange (Henri Gilabert), a fallout shelter engineer who is accidentally trapped in susp… It belongs to the Sci-Fi & Fantasy, Mystery genres.

In which language is Sial IV originally available?

Sial IV was originally produced in FR. On Bowood.TV the show is available in its original FR audio. Check the player options on the watch page for available subtitle tracks.

When was Sial IV first released?

Sial IV first premiered on January 1, 1969 (1969). The series has since concluded its run.

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