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Fire Country Adds Olivia Thirlby In 'Mysterious' New Season 5 Role

'Fire Country' shakes up Season 5 with its first-ever series regular—and a Hollywood veteran making history.

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The brief

CBS drama *Fire Country* has announced Olivia Thirlby as its first series regular for Season 5, marking a significant shift in the show’s cast. According to coverage from *Deadline* and *TVLine*, Thirlby’s role remains undisclosed, described only as 'mysterious' and 'highly anticipated.' The move follows a pattern of limited cast changes in previous seasons, making this addition notable. Outlets including *IMDb* and *Yahoo* highlight the historic nature of Thirlby’s casting, framing it as a potential turning point for the series. *Just Jared* emphasizes her status as the show’s first series regular, while *Deadline* notes CBS’s rare decision to expand the main cast.

Speculation about her character’s identity and impact on the plot dominates fan discussions, though official details remain scarce. With Season 5’s production underway, attention will focus on Thirlby’s character reveal and how her addition alters the show’s narrative direction. Coverage suggests the role may tie into unresolved threads from earlier seasons, though no specifics have been confirmed.

Fans and critics will scrutinize whether this change revitalizes the series’ trajectory.

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Quick answers

Who is Olivia Thirlby joining in *Fire Country*?

Olivia Thirlby is cast as a 'mysterious' new series regular for Season 5, marking the first time *Fire Country* has added a main cast member.

Why is this casting historic for the show?

Thirlby’s role is the first series regular addition in *Fire Country*’s history, according to *Deadline* and *Just Jared*, making it a rare and notable development.

What details are known about her character?

Coverage from *TVLine* and *IMDb* describes her role as 'mysterious' but provides no specifics about her character’s identity, backstory, or plot function.