Blue Planet III’s arrival in London wasn’t announced with a press release or a red carpet. It came with a whale. The creature breached across Piccadilly Lights on Tuesday night, its arc synced to a digital wave that flooded the iconic screen — a moment that marked the first public unveiling of the series’ trailer. The BBC staged what it called a global premiere at The Venue at Piccadilly Lights, transforming the heart of London into an immersive oceanic experience. Attendees walked a blue carpet instead of the traditional red, and the event featured live appearances, music, and a specially recorded message from David Attenborough, who turned 100 earlier this year. He reflected on narrating the third season of the landmark series: “Twenty-five years ago, when I narrated the first Blue Planet, it didn’t occur to me that I would be narrating a third in my centennial year.” The six-part series, produced by the BBC Studios Natural History Unit over four and a half years, will premiere later this year on BBC One, iPlayer, and BBC America. It continues the legacy of the original Blue Planet, now a cultural touchstone for environmental awareness. Hans Zimmer, who composed the score, described the project as the most important work he’s ever done. “I’ve worked on a lot of films,” he said, “but nothing affects humanity, our world and our planet as much as the work being done by the Natural History Unit in Bristol.” The soundtrack also includes an original song by Jade Thirlwall, former member of Little Mix. Greg James hosted the evening. Zai Bennett, CEO and chief creative officer of BBC Studios global content, said the event celebrated “the power of world-class British creativity to stop people in their tracks, spark collective awe and connect audiences across generations, and across the globe.” The series is set to deepen understanding of the ocean’s hidden wonders, revealing life forms more surprising, sophisticated, and vital than previously imagined. The trailer, featuring footage from the new episodes, is now available.