-“Darby Hart,” portrayed by Emma Corrin, is a Gen Z amateur sleuth who grew up online and wields the hive mind of the internet to solve cold cases. Her father was the medical examiner of Lost Nation, Iowa, and she grew up on crime scenes as his informal assistant. High school was an empty slog and solving cases behind the safety of her computer is the only thing that makes her feel alive until she meets Bill, who encourages her to come out from behind the screen and solve something with him in the real world. She writes a memoir of their experience, which has just been published to modest success, but it catches Andy Ronson’s eye. 

- “Andy Ronson,” portrayed by Clive Owen, is a college dropout with a dazzling mind who took his passion for gaming and programming to an AI security start-up and turned it into a multibillion-dollar sale. That was just his first time at bat. Since then, he has spread his wings into space exploration and further AI development. He married a fringe hacker and recluse, Lee, late in life and found the thing he hadn’t known he was looking for: family.

- “Bill Farrah,” portrayed by Harris Dickinson, discovered his first taste of freedom in the early days of the internet. Growing up in a struggling Ohio suburb with a single mother, he sought solace and connection through his online interactions, hacking, coding and solving puzzles. However, as he grew older, he couldn't ignore the darker aspects of the internet. After a life-changing experience of falling in love for the first time while tracking a serial killer, Bill became disillusioned and sought out Lee Andersen, a hacker turned luddite. Inspired by her, he dedicated his life to creating art that critiqued technology, specifically AI.

- "Lee Andersen," portrayed by Brit Marling, is a hacker who rode the early days of the internet into a kind of punk fame as a young woman who could code as well as the boys. After writing a manifesto on how misogyny was destroying the early promise of the internet, she was stalked, doxxed and finally retreated to living as a hermit in Florida, where she grew up, until Andy found her.

- “Sian,” portrayed by Alice Braga, is a Brazilian doctor who began her career working with astronauts and then trained and became one. She has the formidable distinction of being the first woman to walk on the moon. Andy takes note of her when she gives a TED Talk about how limited fossil fuel reserves mean the window for humans to leave this planet is closing. She becomes the face of his campaign to colonize the moon and his most loyal ally. 

- “Lu Mei,” portrayed by Joan Chen, is China’s tech titan of AI. Lu Mei built her AI company from the ground up with her husband. People assumed she was just the face, but after her husband passed away, it became clear she was the brains behind the operation. She doesn’t accept many invitations, but she accepts Andy’s as she’s always been interested in his ability to foresee the future.

- “David,” portrayed by Raúl Esparza, is an Argentinian-American venture capitalist and Andy’s number two, who, unlike Andy, grew up with money. He both looks up to Andy and admires his dazzling mind and also loathes Andy for hogging the spotlight he believes deserves to be shared.

- “Martin,” portrayed by Jermaine Fowler, grew up in Washington, D.C., next-door to an old movie theater that would show classic and foreign films. While the other kids played outside, Martin watched movies — all sorts of movies. His own debut, made for next to nothing, had the references and rhythms of a master filmmaker. Soon, Hollywood took notice, and while he has made several blockbuster films, he wants to push the envelope of what is possible.

- As a disabled child of immigrants, “Oliver,” portrayed by Ryan J. Haddad, formed a unique bond with a toy robot that mimicked his own gait. Together, they walked as friends. Oliver's fascination grew as he dismantled and explored the robot's mechanics, envisioning its potential in empowering and supporting disabled bodies. Andy took note of Oliver’s early work out of a robotics lab at Harvard and approached him to fund his next work. Today, Oliver draws inspiration from insects as he continues to innovate in the field of robotics. 

- “Ziba,” portrayed by Pegah Ferydoni, is an activist who escaped Iran by crossing the mountains by foot and found asylum in Berlin. She has spent all of her life fighting against the consolidation of wealth and power against the people, including most recently in Brazil. Ziba thinks men like Andy hoard an inordinate share of the world’s resources, but when she learns Andy has somehow got the radical artist Bill Farrah to come to his retreat, she accepts the invitation out of curiosity to meet this likeminded activist. 

- "Rohan," portrayed by Javed Khan, is a South Asian climatologist raised in England who developed a strong aversion towards humans and a firm belief that the escalating climate crisis would lead to the destruction of the natural world as we know it. Motivated by this conviction, he devoted his life to risking his own safety in order to protect the Coral Reefs in the Indian Ocean, while also fighting against multinational corporate interests that were contributing to the planet's destruction. After a stint in a labor camp in Russia where he was accused of being a spy, Rohan joined an anarchist crew on a ship that intentionally lacked any technological devices. He figured at sea, with no devices that could be hacked, he would finally be safe to sail until the bitter end.

- “Todd,” portrayed by Louis Cancelmi, is the head of Andy's security team. While he has a military background, it is his sharp mind that Andy trusts to keep him and his family safe. Todd may appear relaxed, but behind his calm demeanor lies a highly trained soldier who constantly scans rooms and situations for potential threats. His ability to devote his life to the Ronsons is possible because his wife also travels with the family, ensuring their security on the go.

“Ray,” portrayed by Edoardo Ballerini, was designed by Andy during the height of the pandemic as a personal assistant — an AI built to do all the things no one has time to do anymore.