Inside Channel 5’s ‘The Imposter’: Cast, Characters, and the Secrets That Tear Families Apart

Family dramas have always found a special place in television, but Channel 5’s latest thriller, The Imposter, takes the genre to a new level of psychological intrigue and emotional complexity. Premiering December 15, 2025, this Australian-set series throws viewers into the heart of the O’Riley family, whose seemingly idyllic life running a seaside hotel is upended by long-buried secrets and an unexpected visitor.

The O’Riley Family: A Hotel, a Matriarch, and a Dangerous Secret

At the center of The Imposter is Helen O’Riley, played by the acclaimed Jackie Woodburne. Helen’s iron will keeps her family and the sprawling hotel they run together tightly bound, but it’s clear from the outset that control comes at a cost. The hotel isn’t just a business—it’s a battleground for old resentments, dashed dreams, and the simmering consequences of choices made decades ago.

Helen’s past is a shadow she can’t escape. In her youth, she left behind a child, Amanda, born in the UK and put up for adoption so Helen and her sweetheart Bill could start anew in Australia. That decision, and the secrets wrapped around it, are the fuse that threatens to blow the family apart, especially when Amanda—Helen’s secret daughter—arrives unexpectedly.

The Imposters: Two Amandas and a Family in Crisis

The heart of the series’ tension lies in the dual presence of ‘Amanda’ and Amanda, played by Kym Marsh and Dannii Minogue respectively. Kym Marsh’s ‘Amanda’ is a survivor, shaped by a tough upbringing in the UK and always ready to bend the rules if it means getting what she believes she’s owed. Her journey to Australia is fueled by opportunity—and perhaps something darker beneath the surface.

Dannii Minogue’s Amanda is the real deal: Helen’s firstborn, the family’s secret shame and regret. Her reappearance is less a homecoming and more a reckoning, as she forces Helen and the O’Rileys to confront everything they’ve tried to bury. The dual Amanda storyline is a clever narrative device, keeping the audience guessing about motives and identities as the stakes rise.

Meet the Rest of the Cast: Sibling Rivalries and Marital Strains

The O’Riley children are as varied as they are troubled. Don Hany plays Simon, the eldest son, whose naivete and impulsiveness make him both vulnerable and dangerous. Feeling trapped by his mother’s decisions—especially her refusal to sell the lucrative hotel—Simon starts digging into Helen’s past, setting off a chain reaction with consequences for everyone.

Jane Harber brings depth to Kate, the dutiful daughter caught between loyalty and a yearning for escape. Her marriage to Todd (played by Charlie Clausen), a charming but troubled real estate agent, is a facade—outwardly perfect but crumbling behind closed doors. Todd’s ambitions hinge on the hotel’s sale, adding yet another layer of pressure to a family already at breaking point.

The youngest sibling, Ian (Jackson Gallagher), and his partner Lee (Kabir Singh) represent a new generation’s hopes and struggles. Ian’s sense of duty keeps him tethered to the family business, but he dreams of a life where he and Lee can start a family of their own, free from Helen’s grip and the hotel’s demands. Lee, the peacemaker, tries to hold things together, but even he can feel the ground shifting underfoot.

Behind the Scenes: Familiar Faces, Fresh Roles

The Imposter boasts an impressive ensemble of actors, many of whom are household names in Australia and the UK. Jackie Woodburne, a stalwart of Neighbours, brings years of experience to her portrayal of Helen. Dannii Minogue, best known for her pop career and appearances as a TV judge, steps into the dramatic spotlight as Amanda, while Kym Marsh, familiar to fans from Coronation Street and Waterloo Road, takes on the complex role of the ‘imposter’ Amanda.

Don Hany, Jane Harber, Charlie Clausen, Jackson Gallagher, and Kabir Singh round out the cast, each bringing nuance to their roles as members of a family torn between loyalty, ambition, and resentment. The series is also notable for its Australian coastal setting, which provides both a picturesque backdrop and a sense of isolation that mirrors the family’s emotional landscape (Radio Times).

What Makes ‘The Imposter’ Stand Out?

While family secrets and inheritance battles are familiar territory for TV drama, The Imposter stands out thanks to its layered characters and the moral ambiguity that runs through every storyline. There are no easy heroes or villains here—only people doing what they think is necessary to survive or protect those they love.

The show’s narrative structure, playing with dual identities and shifting perspectives, keeps viewers guessing about who can be trusted and what’s really at stake. The looming sale of the hotel is more than a business decision; it’s a test of loyalty, a catalyst for confession, and a trigger for old wounds to resurface.

At its core, The Imposter is a story about the cost of secrets and the complicated ways families navigate guilt, forgiveness, and self-preservation. The show refuses to offer easy answers, challenging viewers to ask themselves: What would you do if your family’s future depended on a lie?

Assessment: Channel 5’s ‘The Imposter’ succeeds not just because of its high-caliber cast or its scenic Australian setting, but because it taps into universal anxieties about family, belonging, and the shadows we carry from the past. The show’s willingness to embrace ambiguity and resist tidy resolutions makes it a compelling watch for anyone who’s ever wondered what secrets lie beneath the surface of the people they think they know best.