A research submarine beneath the Arctic stumbles upon a terrifying secret with Earth-shattering consequences.
Cast: James Nesbitt, Orla Brady, Goran Visnjic, Minnie Driver, Dan Li, Nigel Whitmey, Sacha Dhawan, Molly Jones, Tobias Menzies, Vera Graziadei, Sinéad Cusack, Amit Patil, Tom Wlaschiha, Nick Nevern, Richard Brake, Goran Kostic, Ron Donachie, Antonia Thomas
The Orpheus crew have found rare bio fuels in the ocean depths, but they must find a way of getting it to the surface safely. With the Russian captain of the Volos submarine determined to stop them, will they manage to stabilise the energy source and make it back to the surface?
The Orpheus is mended, and the captain wants the crew to find more of the rare bio-fuel samples before they return to the surface. The Russian captain has other ideas, however, and instructs his men to kill the crew.
The Orpheus crew's quest for renewable energy has led them into danger. They're trapped on Volos, a Russian submarine, and its nuclear reactor is dangerously overheating. Whoever shuts it down will be exposed to lethal radiation.
The scientific crew on the Orpheus submarine runs into severe danger in their quest to find rare micro-organisms. One crew member has died, the Orpheus has been intercepted and two of the crew are trapped and running out of air.
The Orpheus' team of scientists are on a mission to find a renewable source of energy in the depths of the Arctic Ocean. The last team who went died in mysterious circumstances, so the Orpheus crew are already feeling nervous when a salvage inspector unexpectedly joins their mission.