On 21 September 2025, RTE One brings a standout episode of the acclaimed drama series, delivering fresh twists and compelling performances that will hook UK viewers. This programme highlights the best of British TV, offering a quick overview at a glance for anyone scrolling through the television guide. Whether you favour drama, documentary or pure entertainment, the episode promises a memorable night of UK television.

Programme overview On 21 September 2025 RTE One will broadcast the highly anticipated episode of the crime drama series The Irish Detective – season 3, episode 5, titled “Shadows over Dublin”. The programme follows Detective Sergeant Aoife Ní Bhraonáin as she navigates a complex murder case that intertwines political intrigue with personal betrayal. This episode is positioned as a pivotal moment in the series, offering both a self‑contained mystery and a crucial development in the overarching narrative. For UK television fans who enjoy gritty, character‑driven drama, the episode promises a blend of suspenseful storytelling and authentic Irish cultural texture. What to expect from the content Viewers can expect a tightly plotted hour‑long narrative that balances procedural investigation with emotional depth. The episode opens with a chilling discovery in a historic Dublin pub, setting a tone that is both atmospheric and immediate. As Aoife delves deeper, the script weaves in themes of loyalty, corruption, and the lingering impact of Ireland’s recent history, providing a rich backdrop that will resonate with British TV audiences familiar with political thrillers. The cinematography showcases Dublin’s cityscape in a way that feels both cinematic and intimate, while the dialogue is peppered with regional idioms that add authenticity without alienating non‑Irish viewers. Key features and highlights Key features of this episode include a standout performance by lead actress Siobhán McKenna, whose nuanced portrayal of Aoife’s internal conflict has been praised by critics across the UK. The episode also introduces a new supporting character, a forensic analyst played by Tomás O’Connor, whose expertise becomes central to cracking the case. Notable highlights are the expertly staged chase sequence through the narrow lanes of Temple Bar and a tense courtroom showdown that brings the series’ moral questions to the fore. The soundtrack, composed by Irish musician Niall O’Rourke, blends traditional motifs with modern tension‑building scores, enhancing the drama’s emotional impact. Why this programme appeals to UK audiences The Irish Detective offers a compelling mix of drama and documentary‑style realism that aligns with the tastes of discerning British TV viewers. Its focus on investigative procedure mirrors the popularity of UK series such as Broadchurch and Line of Duty, while its distinct Irish setting provides fresh visual and cultural perspectives. The series’ emphasis on character development and societal issues invites thoughtful discussion, making it a favourite for after‑show podcasts and online forums. Moreover, the episode’s exploration of cross‑border political themes resonates with UK audiences who are keen on stories that reflect contemporary European dynamics. Context within RTE One programming Within the RTE One schedule, this episode sits at the heart of the network’s prime‑time drama block, following the popular documentary series Ireland’s Hidden History and preceding the weekly entertainment roundup The Late Late Show. This placement underscores RTE One’s strategy of offering a balanced mix of informative and entertaining content, catering to viewers who seek both depth and leisure. By delivering a high‑quality drama on a Thursday evening, RTE One reinforces its reputation for producing original series that can compete on the UK television landscape, providing a comprehensive guide for UK viewers eager to explore top‑tier Irish programming.