BBC police drama has captivated viewers with its gritty Belfast setting, earning comparisons to hit series Line of Duty - and all three seasons are available to stream free on BBC iPlayer08:37, 20 May 2026Three complete seasons of the police drama are now available for binge-watching, and viewers appear unanimous in their praise for this latest BBC triumph.‌When the third series arrived, audiences were delighted to have fresh episodes to devour, and justifiably so, as they awarded it an impressive 100% perfect rating on review platform Rotten Tomatoes.‌Blue Lights is a police drama centred on a fictional station called Blackthorn in Northern Ireland, unfolding against a backdrop of raw intensity and emotional turmoil.‌The series chronicles the daily experiences of a Belfast police force as they interact with various community members.Throughout the narrative we encounter hardened criminals and ordinary residents, and unlike similar programmes in the genre, it focuses on the internal dynamics of policing rather than the investigations themselves.‌The ensemble features Sian Brooke, Katherine Devlin, Nathan Braniff, Martin McCann and Richard Dormer, all of whom have garnered widespread acclaim for their authentic portrayal of the police force.Discussing the cast, one viewer wrote: "Absolutely brilliant acting. One of the best series I've ever watched. Characters and plots are brilliant. Totally believable, and the tension at times is almost palpable. If you've not watched it yet, what are you waiting for?"Another reviewer said: "Just. WOW. Better than anything we've watched that I can remember. Great writing, good character development, and what a plot! I figured seasons 2 and 3 would probably be a let-down, but I see they get even higher tomato ratings."‌Spanning three seasons, Blue Lights portrays the immense pressures facing the force, particularly across the Belfast area, shining a spotlight on the widespread organised crime that permeates the region, including corruption at the very heart of the force itself.Each episode peels back the layers of intricate conspiracies that officers must unravel, navigating loyalist tensions while battling a formidable criminal dynasty.‌One critic said: "EXCELLENT show. Well-paced and well-written, believable characters and tense storylines set this show apart in the best way in the crowded field of policing dramas."One devoted viewer hailed the third season as "outstandingly excellent on all counts!", adding: "I love it when you feel the creators love their characters! Even most of the bad guys have a touching, loveable side. Line of Duty excellence + so much human warmth and authenticity = what else could I hope for?"Blue Lights has reportedly been given the green light for a fourth season, buoyed by the remarkable success of its predecessors, though an official launch date remains under wraps. Fans are eagerly anticipating its arrival sometime in 2026.Article continues belowAll episodes of Blue Lights are currently available to stream for free on BBC iPlayer, so settle in and get watching.