Garth Is ‘The Testaments’ Most Dangerous Wild Card — Here’s Everything That Happens to Gilead’s Secret Rebel

‘The Testaments’ has quietly built one of Hulu’s most compelling new characters out of someone who barely registers on the page in Margaret Atwood’s source novel. Garth, the young Guardian assigned to the MacKenzie household, is shaping up to be the beating heart of the show’s resistance storyline, and the closer you look at his arc, the more unsettling his situation becomes.

Played by Brad Alexander, Garth enters the series as a seemingly loyal cog in Gilead’s machinery. He works as a young Guardian for the MacKenzie family while secretly operating as a deep-cover agent for the Mayday resistance group and serving as Daisy’s handler. That tension between public obedience and private rebellion is what makes every scene he shares with Agnes and Daisy feel quietly electric.

Garth’s Mayday Double Life and What Drives Him Into the Resistance

The show wastes no time establishing that Garth is not what he appears. When Daisy hands over a map of the school she has made for Mayday, Garth plays dumb the moment other girls appear nearby, demonstrating how carefully he manages his cover even in high-stakes moments. His loyalty to the rebellion is total, but the series makes a point of showing how fragile his position really is.

Brad Alexander has said that the mechanics of how Garth originally joined Mayday remain something of a mystery within the story, but that two big influences pushed him toward the resistance. The first is a moral one. Alexander explains that Garth has been exposed firsthand to how the personalities of these girls are being diminished just so they can fit into Gilead’s patriarchal world, and that this has led him to a sincere moral realization about how wrong the regime is.

The second motivation runs deeper and more personal. Garth’s father was a well-renowned Commander and fighter of Gilead up until what the show calls the Boston moment, and he was injured in that event. That injury seeded a resentment in Garth that the series has only begun to unpack. Alexander says that as a result, Garth is also angry at the system that raised him.

How Garth Differs From the Book Version

One of the most significant creative choices the show makes concerns Garth’s origins. In Margaret Atwood’s novel, Garth actually lives in Canada rather than inside Gilead, making his television incarnation almost a completely different character. The series plants him directly inside the regime’s borders, which raises the stakes considerably.

Alexander says he conceptualizes Garth as a Gilead native who has grown up in this world and been exposed to its propaganda his entire life, with little to no memory of anything that came before it. That reframing transforms the character from an outside operative into something more disturbing, a man who was formed by the very system he is trying to destroy.

Alexander has noted that reading the original novel was actually helpful in creating his version of Garth even though the character is almost entirely reinvented, and that what carries over is the sense of Garth being confused but well-intentioned, wanting the best for everyone even if he is uncertain about how to get there.

The Commander Promotion and What It Means for Agnes

The pivot point of Garth’s season-one arc arrives in episode five. Agnes and her fellow Green girls attend a ball where they are paraded before Commanders looking for young wives, and Agnes becomes particularly interested in Garth after learning he is being promoted to Commander in the coming weeks. A dance between the two deepens her feelings in ways that viewers can see clearly, even as Garth himself struggles to name what he is experiencing.

Alexander says that Garth’s conception of romantic love is essentially nil, that he does not really understand what it even is, and that all of these feelings are ones he is confronting for the first time with no idea what is happening within his own body. The show frames this as genuinely moving rather than convenient, because Garth’s emotional illiteracy is a direct product of growing up under Gilead.

Alexander acknowledges that Garth is perhaps a little naive about what his new Commander status actually means, and that while he sees it as an opportunity to advance Mayday’s goals more aggressively, he may not realize it also places him in a riskier position where the insider information he gains becomes a vulnerability. The promotion is not a triumph so much as a ticking clock.

Garth, Becka, and the Love Triangle Gilead Created

By episode seven, Garth emerges as a potential suitor for Becka rather than Agnes, creating a scenario that is emotionally complicated for everyone involved. Agnes does not want the person she has feelings for to be matched with her close friend, while Becka herself has no desire to be married at all. Given that Garth is secretly working with Mayday, there is at least a quiet reassurance in the idea that he would not hurt Becka if they ended up paired together.

In episode seven, Garth also confiscates Daisy’s vintage radio during a handoff, coldly telling her it is contraband and that she will have no use for it where she is going. It is a chilling moment that underlines just how convincingly he can perform loyalty to the regime when necessary. Alexander has compared Garth directly to Nick Blaine from ‘The Handmaid’s Tale’, describing how both characters represent men struggling to reconcile their positions within Gilead’s patriarchy with the crushing moral realization that the women around them are being diminished. Whether Garth’s double life holds together long enough to actually matter for the resistance is the question now driving his entire storyline forward, and it is very much worth sharing your thoughts on which direction you think his arc will take before the season finale.