The Third Day (TV) Cast
The cast of The Third Day. Updated on September 15, 2025.
28 actors
Jude Law
as Sam (6 episodes)

Jude Law portrays the character of Sam in The Third Day. Sam is a complex and troubled individual who finds himself entangled in a mysterious and unsettling series of events. Law's portrayal of Sam captures the character's emotional journey and inner turmoil.

Katherine Waterston
as Jess (6 episodes)

Katherine Waterston takes on the role of Jess in The Third Day. Jess is a strong and enigmatic character who becomes intertwined with Sam's story. Waterston brings depth and vulnerability to her portrayal of Jess, adding layers of intrigue to the character.

Freya Allan
as Kail (6 episodes)

Freya Allan plays the character of Kail in The Third Day. Kail is a young woman who becomes closely connected to Sam's journey. Allan's performance showcases Kail's resilience and determination as she navigates the challenges presented to her.

John Dagleish
as Larry (6 episodes)

John Dagleish portrays the character of Larry in The Third Day. Larry is a charismatic and unpredictable individual who adds an element of mystery to the story. Dagleish brings a captivating energy to his performance, capturing Larry's enigmatic nature.

Mark Lewis Jones
as Jason (6 episodes)

Mark Lewis Jones takes on the role of Jason in The Third Day. Jason is a local resident who is deeply rooted in the island's history and traditions. Jones' portrayal of Jason brings depth and authenticity to the character, capturing his connection to the island's past.

Börje Lundberg
as Professor Mimir (6 episodes)

Börje Lundberg portrays the character of Professor Mimir in The Third Day. Professor Mimir is an enigmatic and knowledgeable figure who holds key information about the island's mysteries. Lundberg's performance highlights the character's intellectual prowess and adds to the show's suspense.

Paddy Considine
as Mr. Martin (6 episodes)

Paddy Considine plays the character of Mr. Martin in The Third Day. Mr. Martin is a mysterious and influential figure who holds sway over the island's inhabitants. Considine's performance brings a sense of gravitas and intensity to the role, making Mr. Martin a captivating character.

Emily Watson
as Mrs. Martin (6 episodes)

Emily Watson portrays the character of Mrs. Martin in The Third Day. Mrs. Martin is a complex and intriguing character who plays a pivotal role in the unfolding events. Watson's performance captures Mrs. Martin's nuanced emotions and adds layers of depth to the character.

Jessie Ross
as Epona (3 episodes)
Richard Bremmer
as The Father (3 episodes)
Tai Golding
as (1 episode)
Tabitha Byron
as Dig Girl (1 episode)
Mani Lad
as (2 episodes)
Stanley Auckland
as Boy with Glasses (4 episodes)
Lauren Byrne
as Mya (4 episodes)
Sonera Angel
as Wallpapering Young Woman (3 episodes)
Nico Parker
as Ellie (3 episodes)
Charlotte Gairdner-Mihell
as Talulah (3 episodes)
Paul Kaye
as Cowboy (3 episodes)
George Potts
as Alan (3 episodes)
Anna Calder-Marshall
as Margaret (3 episodes)
Hilton McRae
as Janny (3 episodes)
Naomie Harris
as Helen (3 episodes)
Joe Blakemore
as The Smiling Boy (7 episodes)
Henry Thomas
as Boy (1 episode)
Amar Chadha-Patel
as Preacher (5 episodes)
Tom Lawrence
as Tomo (5 episodes)
Will Rogers
as Danny (3 episodes)
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