The Light in the Hall cast: Who stars in season 2 of the Channel 4 Welsh thriller?

The Channel 4 drama returns for season 2.

A large projected portrait of a young man fills the centre of a dark exhibition space. The image is tinted in warm yellow tones and framed by an architectural archway. In the foreground, the silhouette of a person stands looking at the display, while a dark object partially obscures the bottom of the projection. The scene has a contemplative, memorial-like atmosphere.

Channel 4

Published: Tuesday, 16 June 2026 at 10:30 am

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Welsh drama The Light in the Hall (Y Golau: Dŵr) returns for season 2, titled Still Waters, which is once again set in the fictional town of Llanemlyn, where residents are up in arms about a plan to expand a reservoir – a battle which "reignites long-buried tensions".

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"Told across two timelines, the story begins in 1995, when activist Llyr Owen (pictured above) dies in a bombing and his cousin Rhys is jailed for the crime," continues the synopsis.

"Thirty years later, Rhys returns home to a community once again divided by protest. As trainee journalist Caryl becomes drawn into the story, her investigation begins to unravel hidden truths, exposing secrets that have shaped the town for decades, in a gripping drama of protest, guilt and generational reckoning."

Caryl, played by Siân Reese-Williams, is the only character to return for the second season of The Light in the Hall, but who else is in the cast?

Read on to find out.

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The Light in the Hall main cast

For more information about the characters and where you've seen the cast before, read on.

Siân Reese-Williams plays Caryl

A close-up of a woman outdoors with a thoughtful, slightly tense expression. She has shoulder-length light brown hair parted in the middle, dark eyebrows, and is wearing large hoop earrings, a dark coat, and a light-colored top. The background is blurred, showing trees and an overcast sky, while part of another person is visible out of focus in the foreground on the right.

Siân Reese-Williams plays Caryl. Channel 4

Who is Caryl? The only character to return from season 1, Caryl is a trainee journalist who believes Rhys Owen might be innocent.

What else has Siân Reese-Williams been in? You might know her from Emmerdale, Downfall: The Power of Huw Edwards, Hidden, Wolf, and 35 Diwrnod, among others.

Mark Lewis Jones plays Rhys Owen

A middle-aged man in a dark jacket and blue collared shirt looks intently at a police officer standing in front of him. The officer is shown in profile and slightly out of focus, wearing a high-visibility uniform with a radio attached. The scene appears to be outdoors on an overcast day, with a pale, blurred background that emphasizes the serious exchange between the two men.

Mark Lewis Jones plays Rhys Owen. Channel 4

Who is Rhys Owen? He has recently been released from prison following his conviction over the bombing that claimed his cousin's life.

What else has Mark Lewis Jones been in? You might have watched him in Keeping Faith, Living a Lie, Stella and Out There, among others.

Maeve Courtier-Lilley plays Mabli Davies Owen

A young woman with shoulder-length dark hair stands indoors holding a folder or clipboard while looking off to one side. She wears an oversized dark jacket over a burgundy top and has a calm, observant expression. Beside her on the wall is a small display featuring a photograph and text, suggesting a gallery, exhibition, or public building. Soft, natural light fills the modern interior, and her shadow is cast clearly on the wall behind her.

Maeve Courtier-Lilley plays Mabli Davies Owen. Channel 4

Who is Mabli Davies Owen? One of the lead protestors against the plans to expand the reservoir.

What else has Maeve Courtier-Lilley been in? You might know her from Run Away, The Red King and The Outpost.

Nia Roberts plays Eve Davies

A woman with long wavy brown hair and bangs sits at a table in a softly lit indoor setting, facing someone off-camera. She wears a rust-coloured blazer over a light top and has her hands clasped in front of her. Her expression is calm and attentive, suggesting a serious conversation. The background is softly blurred, with upholstered seating and small decorative lights visible behind her.

Nia Roberts plays Eve Davies. Channel 4

Who is Eve Davies? A lecturer and Mabli's mum. She also used to date Llyr.

What else has Nia Roberts been in? Her credits include Tree on a Hill, Yr Amgueddfa and Hidden.

Robert Glenister plays Robert Davies

An older man with closely cropped grey hair and a short white beard stands indoors, looking intently toward someone off-camera. He wears a collared shirt layered under a dark sweater and a weathered jacket with a corduroy collar. The room around him is softly lit and slightly cluttered, with shelves, framed items, and household objects blurred in the background, creating a serious and reflective atmosphere.

Robert Glenister plays Robert Davies. Channel 4

Who is Robert Davies? He works for the company that wants to extend the reservoir. Robert is also Eve's dad and Mabli's grandfather.

What else has Robert Glenister been in? His extensive CV includes Law and Order: UK, Hustle, Spooks and Sherwood.

Tom Rhys Harries plays Hari Breckon

A young person with tousled blond hair and a serious, attentive expression sits indoors, looking slightly off-camera. They are wearing a plain white T-shirt and are lit by warm indoor lighting. The background is softly out of focus, showing shelving and household items against a dark teal wall, creating an intimate, conversational atmosphere.

Tom Rhys Harries plays Hari Breckon. Channel 4

Who is Hari Breckon? Mabli's best friend and one of the protestors.

What else has Tom Rhys Harries been in? He has appeared in White Lines, Wolf King, Suspicion and Unforgotten.

Wyn Bowen Harries plays Bryn Owen

An elderly man wearing a grey flat cap, beige coat, and a red-and-navy checked scarf sits outdoors near a body of water. He gazes into the distance with a thoughtful, somber expression. The background is softly blurred, showing a shoreline and hills under an overcast sky, creating a quiet and reflective mood.

Wyn Bowen Harries plays Bryn Owen. Channel 4

Who is Bryn Owen? Rhys's dad. They have a strained relationship.

What else has Wyn Bowen Harries been in? His credits include Rough Cut and Stat.

Additional cast includes:

The Light in the Hall: Still Waters premieres on Channel 4 on Tuesday 16 June at 9pm.

Add The Light in the Hall: Still Waters to your watchlist on the Radio Times: What to Watch app – download now for daily TV recommendations, features and more.

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Authors

Black and white cut-out portrait headshot of Morgan Cormack, smiling against a lime green background

Morgan CormackDrama Writer

Morgan Cormack is a Drama Writer for Radio Times, covering everything drama-related on TV and streaming. She previously worked at Stylist as an Entertainment Writer. Alongside her past work in content marketing and as a freelancer, she possesses a BA in English Literature.

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