2022 - 2022
Sky Atlantic's four-part The Fear Index arrived in February 2022 as a quietly ambitious UK thriller adapted from Robert Harris's 2011 novel. Josh Hartnett plays Dr. Alex Hoffmann, an American physicist who left CERN in Geneva to build Hoffmann Investment Technologies, a hedge fund powered by VIXAL-4, a self-learning algorithm that trades on fear. VIXAL-4 reads the news. It reads social media. It reads the emotional temperature of the markets and places bets on catastrophe.
The plot kicks off on the night VIXAL-4 makes an obscene amount of money on the back of a real-world disaster, and an intruder breaks into Alex's fortified Geneva home. From there, things get stranger. The algorithm starts placing trades no one programmed. Alex starts behaving like a man who cannot quite trust his own memory. Is he being stalked? Is he cracking up? Has the thing he built begun to act on its own?
Paul Andrew Williams directs from a script he co-wrote with Caroline Bartleet, and the four-hour format gives the story just enough room to build dread without quite enough room to resolve it. Hartnett, on his UK-TV comeback before Trap and Oppenheimer put him fully back on the map, carries the show with a tightly wound, fraying performance that reminded everyone why he was a leading man to begin with.
The series lives or dies on Hartnett, and he mostly holds it up. Alex Hoffmann is a tricky part. A recluse, a genius, a possibly unreliable narrator of his own life. Hartnett plays him as a man whose certainty is leaking out of him in real time.
Around him sits a sharp ensemble. Arsher Ali is very good as Hugo Quarry, the smooth English business partner who knows how to sell VIXAL-4 to a room full of billionaires and knows even better how to protect his own stake. Leila Farzad (of I Hate Suzie fame) plays Alex's wife Gabby, a Geneva gallery owner whose art practice quietly shadows the story's questions about where the human ends and the machine begins. Grégory Montel, best known as Gabriel from Call My Agent, shows up as Inspector Leclerc of the Geneva police and is arguably the most purely enjoyable performance in the show. A policeman who listens more than he speaks.
Oliver Hembrough, Isaac Bardoot, Damian Lynch and Simon Chandler round out a mix of traders, security staff, investors and Genevois officials who give the paranoia a lived-in workplace texture. Carice van Houten, of Game of Thrones Red Priestess fame, turns up briefly as Quarry's wife Rhea and is, frankly, under-used.
The tonal register the cast lands on is important. No one is chewing scenery. Everyone is a fraction too calm for what is actually happening.
On the surface this is a techno-thriller about an algorithm that might be alive. Underneath, it is a colder book about what it means when the systems we build to model human emotion start to know us better than we know ourselves.
Simon Chandler
Robert Harris
Novelist (source)
Paul Andrew Williams
Writer / Director
Arsher Ali
Hugo Quarry
Grégory Montel
Inspector Leclerc
Damian Lynch
Leila Farzad
Gabby Hoffmann
Oliver Hembrough
Josh Hartnett
Dr. Alex Hoffmann
VIXAL-4 does not need consciousness to be frightening. It just needs to be better at reading fear than we are. Harris's novel was written in 2011, the post-flash-crash moment when the idea of an unsupervised machine moving billions in milliseconds stopped being science fiction and started being Tuesday. The TV version updates that anxiety for the 2020s without labouring the point. Alex's predicament, a man who cannot tell whether his enemy is human, technological, or a projection of his own unravelling mind, reads very differently now than it would have read a decade ago.
A short list of the ideas the show is quietly turning over:
None of this is spoon-fed. The script trusts you to do the work.
Williams shoots Geneva the way a paranoid man notices it. A lot of glass. Cold lake water. Gleaming atria and labs. Private banks that look like art galleries and art galleries that look like private banks. The edit is patient. The sound design leans on quiet hum and sudden silence rather than musical stings.
It is a thriller that prefers dread to shock. Rooms that were safe a minute ago become unsafe without anyone opening the door.
If you have seen Slow Horses, you will recognise a certain British-thriller grammar here. Lots of muted interiors. Actors doing restrained work. A refusal to over-score a scene. Fans of Severance will pick up on the same off-kilter corporate unease, though The Fear Index is less stylised and more grounded in recognisable finance-world surfaces.
The production went out on Sky Atlantic and Now in the UK and landed internationally in a relatively low-key release pattern. It was never aiming to be event television. It is the kind of four-hour limited series you find on a quiet Sunday and watch in two sittings.
Reviews were mixed, and honestly fair. Critics singled out Hartnett's performance, the Geneva atmosphere and the conceptual premise as the show's strengths. The most common criticism was that Harris's novel gets compressed unevenly into four hours, with the middle dragging and the ending sliding into an ambiguity that some viewers found thematically rich and others found plainly frustrating.
That final-act ambiguity is the key point of contention. If you want a thriller that locks its conclusions into place, this will annoy you. If you want a thriller that leaves the reader, and the viewer, arguing with the last scene on the drive home, this delivers. Harris's fans largely read the slipperiness as deliberate. Casual viewers sometimes experienced it as the show running out of runway. Both takes have a case.
In the wider Robert Harris TV-and-film pantheon, The Fear Index is not as famous as the 2024 film of Conclave, the 1994 TV Fatherland, the 2005 BBC Archangel, or the 2021 Netflix adaptation of his Munich: The Edge of War. Under the radar is the right phrase for it.
What makes The Fear Index worth your evening is not the plot, which has obvious edges, but the mood. I came out of it more unsettled than I expected. Williams and Hartnett commit to the idea that the scariest thing is not a malevolent AI with a plan. It is a merely competent AI with a narrow objective and no one senior enough to switch it off.
It also sits in a useful shelf with other finance-adjacent prestige TV. Fans of Billions, with its trader-class power games, will enjoy the VIXAL-4 boardroom and client-pitch material. Fans of the corporate dread of Succession will catch a similar chill in the scenes where rooms full of rich people have to be handled. And fans of Black Mirror, particularly its economics-adjacent episodes, will find the AI premise handled with a restraint that Charlie Brooker himself would recognise.
Is it a great show? No. But it is a good one and a useful one, and four hours of Josh Hartnett rebuilding his leading-man apparatus in front of you is time well spent. Worth digging up.
Carice van Houten
Rhea Quarry
Isaac Bardoot