The Prime Target cast features Leo Woodall as Edward Brooks, Quintessa Swindell as Taylah Sanders and Sidse Babett Knudsen as Andrea Lavin. This info article contains minor spoilers and character details for Steve Thompson’s 2025 Apple TV+ miniseries. Check out more cast guides in Vague Visages’ Know the Cast category.

Prime Target centers on a young Cambridge mathematician. As Edward Brooks researches patterns in prime numbers, he learns about the death of a trusted professor. The narrative follows the main protagonist as he and a female NSA agent become immersed in an international conspiracy. Here’s every actor and character in Prime Target.

Read More at VV — Know the Cast: ‘Disclaimer’

Prime Target Cast: Leo Woodall as Edward Brooks

Character Profile: A mathematician at Cambridge. He hopes to find patterns in nature through prime numbers. Edward worries about his academic future after a series of bizarre events.

Woodall’s Resume: Rodgers in Cherry (2021), Adrian Ivashkov in Vampire Academy (2022), Jack in The White Lotus (2022), Duke in Citadel (2023), Dexter in One Day (2024)

Read More at VV — Know the Cast: ‘Before’

Prime Target Cast: Quintessa Swindell as Taylah Sanders

Character Profile: A NSA surveillance operator. She hides in plain sight while identifying dangerous academics. Taylah bonds with Edward after learning the truth about a target’s death.

Swindell’s Resume: Tabitha Foster in Trinkets (2019-20), Anna in Euphoria (2019), Julie in Voyagers (2021), Cyclone/Maxine Hunkel in Black Adam (2022), Maya Core in Master Gardener (2022)

Read More at VV — Know the Cast: ‘Bad Monkey’

Prime Target Cast: Sidse Babett Knudsen as Andrea Lavin

Character Profile: A Cambridge professor. She is a widower whose husband suddenly dies. Andrea helps Edward connect the dots of a murder conspiracy.

Knudsen’s Resume: Mercedes in Juletestamentet (1995), Birgitte Nyborg in Borgen (2010-22), Cynthia in The Duke of Burgundy (2014), Theresa Cullen in Westworld (2016), Elizabeth Sinskey in Inferno (2016)

Read More at VV — Know the Cast: ‘Lady in the Lake’

Prime Target Cast: David Morrissey as Robert Mallinder

Character Profile: Andrea’s husband. He is a Cambridge professor who mysteriously dies after learning about Edward’s recent work. Robert’s death links to flashback sequences involving a former female student.

Morrissey’s Resume: The Duke of Norfolk in The Other Boleyn Girl (2008), Dunlop in Blitz (2011), Thomas Geiger in Welcome to the Punch (2013), Philip “The Governor” Blake/Brian Heriot in The Walking Dead (2012-15), Aulus in Britannia (2017-21)

Read More at VV — Know the Cast: ‘Sunny’

Prime Target Cast: Fra Fee as Adam Mellor

Character Profile: A bartender. He develops a romantic relationship with Edward. Adam hopes to find a committed partner.

Fee’s Resume: Courfeyrac in Les Misérables (2012), William Bogue in Boys from County Hell (2020), Hench in Cinderella (2021), Dominic Swayne in Dalgliesh (2021), Kazimierz “Kazi” Kazimierczak in Hawkeye (2021)

Read More at VV — Know the Cast: ‘Presumed Innocent’

The Prime Target cast also includes:

• Stephen Rea as James Alderman
• Joseph Mydell as Raymond Osborne
• Jason Flemyng as Stephen Patrick Nield
• Martha Plimpton as Jane Torres
• Harry Lloyd as Andrew Carter
• Ali Suliman as Dr. Akram Nizar
• Sergej Onopko as Bogdan Vlahovic
• Maanuv Thiara as Dr. Charan Nathoo
• Tom Byrne as Tom Grayson
• Daisy Waterstone as Fiona Carey
• Tim Faraday as Keith Wyatt
• Ian Bouillion as Alex Pope
• Alex Cartuson as Bobby Miller
• Gloria Onitiri as Anneli Potts
• Alison Lintott as Dorothy Hicks

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.