Following on from the dramatic conclusion of the previous series, the new eight-part series 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.
In true Marcella style, the series has interweaving storylines with strands focusing upon the Maguires’ criminal operations. As she inhabits the character of Keira, Marcella’s quest for the truth puts her in danger and others in harm’s way. Her undercover role makes her take risks, but will her old life eventually catch up with her?
An array of new cast members are welcomed to the series including Amanda Burton who takes on the role of Katherine, the matriarch of the Maguire family; Aaron McCusker plays her son, Finn Maguire; whilst Hugo Speer, who made a brief appearance in the final scenes of series two, reprises his role as Frank Young, Marcella’s undercover handler.
Kelly Gough also joins the cast, taking the role of Stacey, Katherine’s daughter; Martin McCann plays Stacey’s husband, with Eugene O’Hare as local police officer Eddie. Michael Colgan plays Rory Maguire, whilst Paul Kennedy plays Lawrence, Marcella’s initial contact within the crime family and Glen Wallace is Matt, a past acquaintance.