As the spring semester at Baird College descends into a final, irreversible tailspin in 2026, a new figure has emerged to challenge the established hierarchy of manipulation. Costa D’Angelo, the Italian-Australian breakout star, joined the cast of Hulu’s “Tell Me Lies” as Alex—a psychology graduate student whose presence is as enigmatic as it is combustible. While Stephen DeMarco has long been the primary architect of the group’s misery, Alex’s arrival introduces a different kind of threat: a man who doesn’t need to shout to be heard and whose “loner” persona masks a deeply layered history. For Lucy Albright, Alex represents a dangerous new frontier—a vulnerability she hasn’t encountered before, wrapped in the guarded intensity of a man who knows exactly how to navigate the darker corners of the human psyche.
The “New Guy” at Baird: Psychology and Street Smarts
Introduced in the January 2026 premiere of Season 3, Alex is far more than just a new face in the campus hallways. A psychology graduate student who moonlights as a part-time drug dealer, he possesses a “uniquely comprehensive” understanding of the student body’s weaknesses. Unlike Stephen’s loud, impulsive brand of manipulation, Alex is described by D’Angelo as “deliberately quiet,” a contrast that makes his eventually “explosive” impact on the Baird ecosystem feel all the more earned. He doesn’t seek the spotlight; rather, he operates in the shadows, creating a sense of unease for those who are used to being the smartest person in the room.
Alex’s backstory adds a poignant layer to the season’s tension. It is revealed that he and Bree (Catherine Missal) share a complicated past as old foster siblings from a dysfunctional home. This shared trauma explains Alex’s guarded approach to connection and his “rules for survival,” which are rooted in a deep-seated fear of abandonment. It is this shared history that intensifies the impact of his actions on the group; his loyalty to Bree often puts him at odds with the self-serving interests of the others, making him a wildcard in a game where everyone is usually playing for themselves.
The Lucy Connection: A Darker Kind of Intimacy
The most talked-about development of Season 3 is the evolving, and increasingly dark, dynamic between Alex and Lucy. For Lucy, Alex is a departure from the “nice guy” archetypes of her past. Their connection is forged in a shared language of hurt and vulnerability, leading to a series of sexual encounters that critics have described as “darker and more complicated than the last.” D’Angelo points to an impromptu hookup in Alex’s car in Episode 4 as the moment that truly unlocks his character, revealing a man who connects with people who have been similarly “broken” by life.
This relationship serves as a direct challenge to Stephen’s hold over Lucy. For the first time, Lucy is met with a partner whose vulnerability is genuine, rather than a calculated performance. This shift unsettles Stephen, who is used to being the only one capable of eliciting such raw emotional responses from her. As the season progresses, the friction between the two men—the established “king of the campus” and the mysterious newcomer—becomes a central engine of the show’s suspense, leading toward a finale where secrets regarding foster care, drug deals, and personal betrayals finally collide.
Rising Star: Who is Costa D’Angelo?
The man behind Alex is a 2022 graduate of the Victorian College of the Arts in Australia. D’Angelo’s rise has been swift; since booking Tell Me Lies only a week after his self-tape, he has quickly become one of the most discussed actors of the 2026 television season. His approach to the role was immersive, involving a meticulously curated playlist of 90s and early 2000s alt-rock—featuring artists like Radiohead, Alice In Chains, and Elliott Smith—to channel Alex’s “moody, introspective” energy. This “Timothée Chalamet-esque” focus on layered, character-driven performances has already made him a favorite of casting directors.
Beyond the halls of Baird College, D’Angelo is set for a massive 2026 and 2027. He has been cast in high-profile Netflix projects, including:
- East of Eden: Playing Young Adam Trask in the limited series adaptation of the Steinbeck classic.
- Untitled Hockey Drama: Starring as Owen Boone in a new series produced by Shawn Levy’s 21 Laps.
- Crazy Fun Park: Showcasing his versatility in the Australian comedy-horror series.
The Alex Legacy: A Mirror to Toxicity
As Tell Me Lies reaches its definitive conclusion, Alex’s character serves as a mirror to the group’s collective dysfunction. By the time the finale, “Are You Happy Now, That I’m on My Knees?”, aired in February 2026, it was clear that his presence was the catalyst for many of the season’s most significant “truth bombs.” Whether he was acting as a protector for Bree or an emotional mirror for Lucy, he forced the Baird Eight to confront the reality that they were no longer just college kids playing at love—they were adults facing the consequences of their own patterns.
Costa D’Angelo’s performance has been praised for its “stillness and centeredness,” a stark evolution from the typical collegiate drama tropes. He successfully transitioned Alex from a “mysterious drug dealer” into a protagonist whose adversities were as compelling as those of the original leads. As the series enters the “post-Stephen” era of television, D’Angelo’s breakout turn ensures that while the story of Lucy and Stephen may have ended, the career of the actor who helped dismantle their web of lies is only just beginning.
