Mackey and – NCIS: Sydney Season 4 (CBS, 2027) will deepen the Mackey–JD connection after a finale cliffhanger involving John Callaghan’s escape.
A season finale can feel like a door closing. but NCIS: Sydney is making sure fans still keep their hands on the handle.. Season 3 ended with multiple loose threads. yet it’s the possible romance between Special Agent Michelle Mackey and Jim “JD” Dempsey that’s already stealing attention heading into what’s planned for season 4—on CBS sometime in 2027—and fans are hoping the show leans further into that chemistry.
During the two-part season 3 finale that aired Tuesday. May 12. Mackey (Olivia Swann) delivered a key win against The Collective’s lead man. Lee Meyers (Angus Sampson).. The victory mattered because it left Meyers back in custody. giving the case a sense of closure—while the bigger momentum of the season kept moving.
The trouble began to spill beyond the immediate plot when corrupt government official US Drug Czar John Callaghan fled Australia with intel tied to the drug dealer.. In Swann’s view. the way Mackey handles her confrontation with Meyers felt like a “success” moment for the character. but she also underscored that the finale’s structure intentionally leaves something unsettled for the road ahead.
That cliffhanger, teased as “exciting,” is rooted in how Callaghan escaped—specifically, after orchestrating a prisoner switch that goes wrong.. Instead of keeping things cleanly contained. the swap brought Mackey’s ex. and the father of her child. Ryan Brady (Ryan Panizza). into the situation. creating complications that propel the finale into a late-breaking twist.
Mackey’s response signals both urgency and instinct.. Before jumping off with Ryan in her arms. she planted her cellphone on the plane—an action Swann described as a fast. “maverick rogue” move that shows Mackey acting on impulse to gain leverage.. The choice also tees up what the season 4 audience will likely want to know next: what exactly happened to the phone. and how the team reads the situation from there.
Swann also pointed to Mackey “teasing JD” in the aftermath, describing the moment as very on-brand for her.. Rather than resolving the mystery instantly. the show appears set on letting small details hang in the air. with Swann saying the storyline will be something viewers can expect when season 4 premieres in 2027.
And beneath the action, the romance question is getting louder.. Swann said the chemistry between Mackey and JD—visible during the finale—isn’t just a passing spark; it’s something the series plans to revisit.. She highlighted that viewers have already seen more closeness and a trust-building trajectory between them during season 3. including moments that deepen their bond rather than keeping it purely professional.
In the season 3 finale run-up, the show leaned into those signals at a personal level.. At Trey’s 18th birthday bash. Mackey tells JD he’s a “catch. ” and the two share a cheeky look—an exchange designed to land as both playful banter and emotional subtext.. Swann suggested this kind of interaction is part of what makes the relationship feel primed for growth.
Looking ahead. Swann confirmed that the focus in season 4 shifts toward character connections. and she made it clear that Mackey and JD sit at the center of that effort.. She framed it as a move toward building relationships on-screen in ways that go beyond plot mechanics. emphasizing how the “unspoken” and “subconscious” dynamics between them have formed over time.
If the relationship crosses a line into something more overt, Swann teased it could change how they operate as partners.. She suggested that if Mackey and JD become a couple. it might “shift” their protection level—and that both of them could be surprised by just how “big and deep” the feelings might become once they’re no longer kept under wraps.
Meanwhile, the show is also preparing another relationship-driven storyline, this time involving teammate dynamics.. Swann said the next season will make the connection between Evie Cooper (Tuuli Narkle) and Travis “Trigger” Riggs (Claude Jabbour) a big plot point. after Trigger told Evie—and no one else—that he accepted another job.. That decision, Swann confirmed, opens the possibility of a romance forming.
Trigger’s quiet announcement sets up emotional fallout as well as future uncertainty. Swann indicated fans will see a shift in how Evie “operates,” including changes in her bravado, as she processes Trigger’s potential departure and what it could mean for the team—especially if Trigger does leave.
All of it is arriving as season 4 is set for CBS in 2027 as part of the network’s midseason lineup.. With Callaghan’s escape and the prisoner switch still echoing from the finale. plus Mackey and JD’s bond moving closer to something undeniable. the next chapter looks poised to blend high-stakes NCIS action with relationships that feel as risky as the cases themselves.
NCIS: Sydney season 4 Mackey JD chemistry Olivia Swann Jim JD Dempsey John Callaghan escape CBS 2027