Olivia Thirlby Joins 'Fire Country' as First New Series Regular

WHO:

Deadline - Olivia Thirlby has been cast as a new series regular in 'Fire Country'.

Deadline - Eric Guggenheim has been appointed as the executive producer and showrunner for 'Fire Country'.

WHAT:

Deadline - Olivia Thirlby will portray a new firefighter character named CJ in Season 5 of 'Fire Country'.

Screen Rant - 'Fire Country' is undergoing a major change with the addition of a new actor to the cast.

WHERE:

Deadline - The series 'Fire Country' is a CBS drama.

WHEN:

Deadline - Season 5 of 'Fire Country' is upcoming.

WHY:

Deadline - The addition of Olivia Thirlby and Eric Guggenheim is part of a significant change in the series.

HOW:

Deadline - The casting of Olivia Thirlby as a series regular marks the first time a new series regular has been added to 'Fire Country'.

(UPDATED June 29, 2026 21:28 UTC)

In a significant development for CBS's drama 'Fire Country', Olivia Thirlby has been cast as a new series regular, portraying a firefighter named CJ in the upcoming Season 5. Alongside her, Eric Guggenheim has been appointed as the executive producer and showrunner, marking a major change for the series. This casting of Thirlby is notable as it represents the first time a new series regular has been added to 'Fire Country'.