Sigma (2026) Review – Jason Sanjay’s Debut Has Star Power but a Screenplay That Never Takes Off

Our Rating: ★★★☆☆ 5.5/10

Few debuts in recent Tamil cinema arrived with as much curiosity as Sigma. Jason Sanjay, son of superstar-turned-Chief Minister Vijay, chose for his first film as director a big-canvas heist action-comedy starring Sundeep Kishan — a film about a penniless librarian chasing a vast treasure belonging to a powerful rival. The theatrical release on 2 October 2026 was met with largely negative reviews, and the film’s arrival on Netflix on 30 October, in five languages, has restarted the same argument: is this a promising debut let down by its script, or a wasted opportunity? Having weighed the evidence, this review comes down on the side of the first reading — but only just, and only because of its leading man.

This review is spoiler-free on the heist’s twists. The treasure, such as it is, is best discovered cold.

Quick Facts: Sigma at a Glance

The Story: A Librarian, a Treasure and a Rival (Spoiler-Free)

Guru (Sundeep Kishan) is a young man in Vizag struggling with financial difficulties, running a home library that was very close to his late mother’s heart. When the library’s survival is threatened, Guru sets his sights on a vast treasure belonging to a powerful rival, and assembles a plan — and a crew — to take it. Along the way he meets Sam (Faria Abdullah), a radio host and owner of an antique shop, and the film tries to balance heist mechanics with comedy and romance across a long, episodic structure.

The central idea is sound: a hero whose greatest asset is knowledge, not muscle, taking on a richer and more powerful enemy, is a classic underdog setup. And the film’s scale is genuinely ambitious — Thaman S’s score and Krishnan Vasant’s cinematography aim for a big-canvas feel, and the production, from Lyca Productions, looks expensive. But the screenplay, as critic after critic has noted, never converts that ambition into momentum. The heist sequences fail to generate excitement, the comedy lands unevenly, the romance feels thinly written, and at 2 hours 24 minutes the pacing sags badly in the middle. The treasure-hunt template and the familiar hero-versus-villain tropes feel dated, and the film repeatedly asks the audience to overlook logic in ways that even a heist comedy should not.

None of this makes Sigma unwatchable. It makes it frustrating, because the talent is visible everywhere except in the writing. A debutant eager to impress is visible in every frame — sometimes that is a virtue, sometimes it is the problem, as stylish shots and edits pile up without building a story underneath them.

Performances: Kishan Carries What He Can

Sundeep Kishan as Guru — Kishan is the film’s biggest asset, and the one point on which audiences and critics largely agree. His energy, comic timing and action work carry scenes that the script abandons, and his screen presence — alongside Sampath Raj’s anchoring villainy and some well-judged comic sequences — is the reason the film remains watchable. Several viewers singled out Kishan’s performance as the film’s saving grace, and this review agrees: without him, the film’s score would be lower.

Faria Abdullah as Sam — Abdullah is hampered by a thinly written role, and the film wastes her: Sam has an interesting setup — radio host, antique shop owner — but the script gives her little to do beyond the romance track, and the romance itself never quite ignites. It is a casting opportunity missed rather than a performance failure.

Sampath Raj, Raju Sundaram, Yogi Babu and the ensemble — Sampath Raj anchors the antagonistic side with authority, Raju Sundaram and Yogi Babu provide comic texture, and Sheila Rajkumar adds support. But the characters are underdeveloped across the board, and even the best supporting turns cannot compensate for a screenplay that never gives them a scene worth remembering.

Direction and Technical Craft

Jason Sanjay directs with obvious ambition and obvious inexperience in equal measure. The film looks good — Vasant’s cinematography is polished, the action is competently staged, and Thaman’s score is one of the film’s genuine strengths — but the direction leans on style to compensate for substance, and the stylish shots and edits become overwhelming after a point. The episodic structure, which might have worked as a series of escalating heist set pieces, instead feels like a collection of ideas that never cohere, and the film’s length exposes every weak seam. The verdict from the film’s own audience has been blunt: a big-canvas debut that offers scale and energy but is let down by a dated, overlong script. That is a fair summary, and this review adopts it.

Music and Sound

Thaman S’s score is one of the film’s few unqualified successes: energetic, large-scale and well-judged, it does more than any other single element to sell the film’s ambition. The sound design is solid without being showy. If the film’s music had a script to match, Sigma might have been a very different conversation.

What Works and What Doesn’t

What we loved:

• Sundeep Kishan’s energetic, committed lead performance
• Thaman S’s score and Krishnan Vasant’s polished cinematography
• A genuinely ambitious big-canvas scale for a debut film
• Sampath Raj’s anchoring presence as the rival
• The underdog librarian premise, which deserved a better film

What could be better:

• A screenplay that never generates heist excitement or suspense
• Dated treasure-hunt tropes and an overlong, sagging middle
• A thinly written heroine and underdeveloped supporting characters
• Comedy and romance that land unevenly
• Style repeatedly substituting for story

Box Office: A Theatrical Disappointment, a Streaming Second Chance

Sigma’s theatrical run was, by all accounts, a disappointment: negative word of mouth followed its 2 October release, and the film was widely described as a box office failure and a loss for its production house. No verified theatrical gross is reported here, as figures varied too widely between trackers to state confidently. Its Netflix premiere on 30 October 2026, in Tamil, Telugu, Kannada, Malayalam and Hindi, has given it a second audience — and, judging by the renewed debate online, much the same verdict: praise for Kishan and the visuals, disappointment with the screenplay. Whether streaming numbers eventually soften that judgement remains to be seen, but the critical consensus is unlikely to move far.

The Netflix Debate: What Sigma’s Second Life Reveals

The most interesting thing about Sigma may be what happened after its theatrical failure. When a film flops in theatres and then arrives on streaming, the conversation usually dies; with Sigma, it restarted, and the reason is the name on the director’s chair. Jason Sanjay is not just any debutant: he is the son of one of Tamil cinema’s biggest stars, a man who has himself left cinema for politics, and his son’s first film was always going to be read as a statement about a dynasty’s future as much as about a heist. That context explains both the harshness of some of the criticism — debutants with famous fathers are rarely given the benefit of the doubt — and the generosity of some of the defence, which frames the film as a learning experience rather than a verdict. The Netflix audience, watching in five languages and without the pressure of a ticket price, has been somewhat kinder than the theatrical audience, praising Kishan’s performance and the film’s visual ambition while repeating the same central complaint about the screenplay. That split verdict is probably the fairest one available: Sigma is a film with a future director inside it, waiting for a script worthy of his ambition. Whether Sanjay’s second film finds that script will tell us more about him than his first film ever could, and Tamil cinema will be watching closely either way.

Verdict: Should You Watch It?

Yes, if you are a Sundeep Kishan fan, a Jason Sanjay watcher, or a viewer who enjoys spotting a debutant’s promise inside a flawed film. Sigma is not the disaster some of its harshest detractors claim, but it is not the debut its pedigree promised either. Watch it for Kishan, for Thaman’s score and for the scale of its ambition — and be prepared to forgive a screenplay that never quite takes off.

Our rating: 5.5/10 — A big-canvas debut with a star performance and a strong score, let down by a dated, overlong script that wastes its own premise.

Frequently Asked Questions

What is Sigma about?

Guru, a financially struggling young man who runs a library in memory of his late mother, chases a vast treasure belonging to a powerful rival in a Tamil heist action-comedy.

Who stars in Sigma?

Sundeep Kishan leads as Guru, with Faria Abdullah, Sampath Raj, Raju Sundaram, Yogi Babu and Sheila Rajkumar.

Who directed Sigma?

Jason Sanjay, son of Vijay, in his directorial debut; he also wrote the film.

When was Sigma released?

It opened in theatres on 2 October 2026 and premiered on Netflix on 30 October 2026 in five languages.

How long is Sigma?

144 minutes (2 hours 24 minutes).

Why is Sigma trending?

Its Netflix premiere on 30 October restarted the debate about Jason Sanjay’s debut, with viewers praising Sundeep Kishan’s performance while criticising the screenplay.

Is Sigma worth watching?

For Kishan’s performance, Thaman’s score and the film’s scale, yes — but go in expecting a weak screenplay and a sagging middle.