The Bravo crew is trapped on a high-tech rig and must undertake a rescue mission in the deep ocean, unaware of the dangers lurking on the seabed as Pictor conceals crucial information about the mission.

Cast: Iain Glen, Emily Hampshire, Martin Compston, Rochenda Sandall, Owen Teale, Stuart McQuarrie, Molly Vevers, Abraham Popoola, Nikhil Parmar, Ross Anderson, Phil McKee, Johannes Roaldsen Fürst, Hiftu Quasem, Alice Krige, Mark Addy, Benedict Andrew, Meg Salter, Sanjeev Kohli