It’s been over a decade since BBC’s Merlin aired its emotional finale, yet the final season still holds a haunting grip on fans. Now, a new wave of nostalgia — and curiosity — is rising as Netflix confirms the production of a documentary titled The Final Prophecy, which promises to reveal the untold secrets, scrapped storylines, and behind-the-scenes drama of the beloved show’s final year.
The five-season series, starring Colin Morgan as Merlin and Bradley James as Arthur, grew from a quiet fantasy drama into an international cult hit. But fans have long speculated that the show’s last season was meant to go beyond what aired — and this upcoming documentary seems ready to confirm it.
Sources close to the production say The Final Prophecy will include newly uncovered footage from the final episodes, as well as candid interviews with the main cast, directors, and producers. Colin Morgan reportedly opens up about his reaction to the show’s ending, calling it “bittersweet, rushed, and not quite what we envisioned.”
One of the most anticipated segments will explore how Arthur’s death scene was conceived, shot, and re-shot — and how alternate endings were drafted but never filmed. In a surprise twist, writers reveal that one early version had Arthur survive, setting up a sixth season or feature-length film that never materialized.
Angel Coulby (Gwen) and Katie McGrath (Morgana) also share their emotional final days on set — and how they lobbied for more character development that didn’t make the cut. Fans can also expect juicy details on scenes that were cut for time or tone, including a lost confrontation between Merlin and the Great Dragon.
The documentary doesn’t just dwell on what didn’t happen — it also celebrates what did. From the innovative effects and medieval sets in Wales to the friendships that formed behind the scenes, The Final Prophecy is part tribute, part reckoning.
Netflix producers hint that the doc will also include never-before-seen bloopers, farewell footage from the wrap party, and even a few surprising reunions — yes, the cast recently got back together for some exclusive interviews filmed this year.
The Final Prophecy premieres on March 12, 2026, exclusively on Netflix, with special advance screenings planned in London, Dublin, Toronto, and New York City in late February. For fans who never quite recovered from the fall of Camelot, this is your chance to ride back into Albion — one last time
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