NCIS: Sydney Season 3 cast and character guide - Every returning star in the CBS spin-off's new chapter

NCIS: Sydney Season 3 is here, and fans can’t wait to see their favorite agents and officers back in action. The hit CBS spin-off, set in the Indo-Pacific, has now reached its biggest season yet. So, if you're wondering who’s returning for this new season, then we have you all covered!

Known faces like Olivia Swann, Todd Lasance, Sean Sagar, Tuuli Narkle, William McInnes, and Mavournee Hazel are all back, and each one of them is ready to face ghosts from their past as the story dives deeper into duty, loyalty, and redemption.

NCIS: Sydney Season 3 cast and character guide - Every returning star in the CBS spin-off

Olivia Swann as Michelle Mackey

Olivia Swann returns to NCIS: Sydney Season 3 as Special Agent Michelle Mackey, the fiery head of the NCIS task force. A former Marine Corps pilot with a complicated history, Mackey continues to lead with equal parts instinct and grit.

In an Instagram post, Swann wrote,

“NCIS: Sydney Season 3 drops today! Bigger and bolder – this season we’re taking everything to the next level.”

Her excitement mirrors Mackey’s own drive, as the new season tests her leadership amid the fallout from Darwin. Fans can expect Mackey to face moral crossroads that reveal both her resilience and impulsive nature.

Swann, best known for her roles in DC’s Legends of Tomorrow and River Wild, brings the perfect balance of strength and vulnerability, keeping Mackey as one of the franchise’s most layered leads.

Sean Sagar as DeShawn Jackson

Sean Sagar’s DeShawn Jackson returns to NCIS: Sydney Season 3 with his characteristic mix of discipline and humor. Always the team’s grounding force, DeShawn is the kind of agent who stays calm when everyone else loses it.

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Sharing his excitement online, Sagar wrote,

“Honestly can’t wait for you guys to see what we have created!”

Known for Our Girl and The Gentlemen, Sagar gives DeShawn a heart that beats beneath the badge. But according to O’Neill, this season will test that loyalty.

Tuuli Narkle as Constable Evie Cooper

Tuuli Narkle is back as Constable Evie Cooper on NCIS: Sydney Season 3, the sharp-tongued associate from the Australian Federal Police.

Evie’s confidence often rubs her colleagues the wrong way, but her instincts are second to none. Narkle, known for her performance in Mystery Road: Origin, brings a fierce intelligence to Evie, who now finds herself confronting the ghosts of her choices.

Evie’s arc this season promises to show a more introspective side beneath her trademark sass.

William McInnes as Dr. Roy “Rosie” Penrose

William McInnes returns as Dr. Roy “Rosie” Penrose on NCIS: Sydney Season 3, the team’s forensic pathologist. A former Navy medic, Roy prefers small talk but reveals the most amount of depth when you least expect it.

McInnes is widely known in Australia for Blue Heelers and The Newsreader. As the new cases take darker turns, expect Rosie to act as the conscience of the group and as a man who understands that everybody on his table tells a story that is worth listening to.

Todd Lasance as Jim “JD” Dempsey

Todd Lasance returns as Sergeant Jim “JD” Dempsey on NCIS: Sydney Season 3 as the counterpart to Mackey’s chaos.

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JD’s personal life has started to crumble, and Lasance teased on Instagram,

“We’re taking over Tuesdays with a huge NCIS night!”

JD’s challenges go beyond the job; his broken marriage and the fallout from recent missions haunt him deeply.

The actor is known from Home and Away, Spartacus, and The Flash.

Mavournee Hazel as Bluebird Gleeson

Mavournee Hazel’s Bluebird “Blue” Gleeson continues to be one of NCIS: Sydney’s most fascinating characters. Her quick forensic mind hides a deep sense of unease that Season 3 plans to unravel further.

The previous finale left fans gasping when a mysterious woman was seen in Blue’s apartment, which is a thread that now pulls her into dangerous emotional territory. Hazel, who previously starred in Neighbours and Shantaram, teased her excitement for the show’s journey, saying, “So proud of this gang.”

Expect Blue to be more central than ever on NCIS: Sydney Season 3 as her past collides with her present investigations, blurring the line between science and psyche.

NCIS: Sydney Season 3 brings back every face fans have come to love but with newer emotional layers. From Mackey’s drive to Blue’s past mystery, the returning cast promises a season that’s both thrilling and also extremely personal.

With its all-star cast like Olivia Swann, Todd Lasance, Sean Sagar, Tuuli Narkle, William McInnes, and Mavournee Hazel, Season 3 proves that this global NCIS spin-off has truly found its heartbeat.