Series 3 poster

Series 3

(2021)

Overview

Following on from the dramatic conclusion of the previous series, season 3 sees Marcella in Belfast as an undercover detective. She has taken on a new identity, Keira, and has infiltrated the infamous Maguire crime family but as she investigates their activities, questions come to the fore about how much she’s embraced the Keira personality and left Marcella behind.

Cast

Anna Friel as Marcella Backland
Anna Friel

as Marcella Backland

Nicholas Pinnock as Jason Backland
Nicholas Pinnock

as Jason Backland

Ray Panthaki as DI Rav Sangha
Ray Panthaki

as DI Rav Sangha

Sinéad Cusack as Sylvie Gibson
Sinéad Cusack

as Sylvie Gibson

Amanda Burton as Katherine Macguire
Amanda Burton

as Katherine Macguire

Nina Sosanya as DCI Laura Porter
Nina Sosanya

as DCI Laura Porter

Jamie Bamber as DI Tim Williamson
Jamie Bamber

as DI Tim Williamson

Harry Lloyd as Henry Gibson
Harry Lloyd

as Henry Gibson

Ian Puleston-Davies as Peter Cullen
Ian Puleston-Davies

as Peter Cullen

Robert Whitelock as Guy Roberts
Robert Whitelock

as Guy Roberts

Laura Carmichael as Maddy Stevenson
Laura Carmichael

as Maddy Stevenson

Charlie Covell as DC Alex Dier
Charlie Covell

as DC Alex Dier

Jack Doolan as DC Mark Travis
Jack Doolan

as DC Mark Travis

David Mallet as Phil Maxwell
David Mallet

as Phil Maxwell

Maeve Dermody as Grace Gibson
Maeve Dermody

as Grace Gibson

Nick Hendrix as Adrien Cooper
Nick Hendrix

as Adrien Cooper

Patrick Baladi as Stephen Holmes
Patrick Baladi

as Stephen Holmes

Ben Cura as Matthew Neil
Ben Cura

as Matthew Neil

Tobias Santelmann as Yann Hall
Tobias Santelmann

as Yann Hall

Episodes

Episode 1 poster

Episode 1 5.6

January 26, 2021

Eighteen months later, Marcella has a new life as a deep undercover operative in Belfast, spying on a powerful family t…

Episode 2 poster

Episode 2 5.6

January 26, 2021

Marcella is recognized on the street, and later finds an odd note on her windshield. When DCI Sangha arrives in Belfast…

Episode 3 poster

Episode 3 7.3

February 2, 2021

Marcella receives an anonymous package. At Jessie's vigil, DCI Sangha spots an eerily familiar face. Finn finds out who…

Episode 4 poster

Episode 4 7.3

February 9, 2021

The Maguires arrange for Bobby to leave the U.K., but the plan goes awry en route to the airport. Katherine sends a thr…

Episode 5 poster

Episode 5 7.0

February 16, 2021

Her stalker's latest threat leaves Marcella suspicious of Frank. After recognizing one of Bobby's abductors in police r…

Episode 6 poster

Episode 6 7.0

February 23, 2021

Marcella recalls how Frank rescued and reprogrammed her 18 months earlier. When Stacey flees from the Maguires with her…

Episode 7 poster

Episode 7 7.0

March 2, 2021

Finn uses Rory's phobia to bully him into an alliance. Marcella confronts Frank with a discovery about his past. DCI Sa…

Episode 8 poster

Episode 8 5.6

March 2, 2021

Marcella's latest blackout leaves her with an unexplained corpse. Wondering why DCI Sangha is still in Belfast, Jack de…