The Deep - Season 1 (2010)

The submarine 'Hermes' disappears in the Arctic,along with its module 'Caspar' with marine biologist Catherine Donnelly on board. Six months later Catherine's engineer husband Clem joins the crew of another submarine,the 'Orpheus',to discover the fate of the 'Hermes',and captained by Frances Kelly,who is in an affair with married crew-man Samson. Also on board is salvage expert Raymond Hopkins,who plays Frances and Clem a recording of Catherine's last words,implying that the 'Hermes' was swallowed by something huge. The 'Hermes' is located but the 'Orpheus' gets stuck...

As the 'Orpheus's computer fails, Raymond protests his innocence,claiming that 'thing above' must have killed Maddy. The 'thing' turns out to be a vast Russian drilling installation,which Frances and Samson explore,discovering crewmen who died as Maddy did,leaking blood. Clem and Samson also stem nosebleeds,exonerating Raymond. The Russians capture the 'Orpheus' crew but Frances works out that the deaths were caused by the rig's nuclear reactor. Frances and Clem find evidence that the 'Caspar' was also taken on board by the drillers.

Arkady,captain of floating rig,'Volos',claims he found wreckage of the 'Caspar' in the water but Clem is not convinced. The nuclear reactor is dangerously over-heating and young crew member Vincent risks his life to shut it down,having been sworn to secrecy by Raymond,whom he saw send a message to the surface. Here the U.N. leader Lowe reveals to his assistant that he is working for Moscow and knows about the 'Volos'. Computer expert Svetlana mends the 'Orpheus' mother-board and the crew escape with Arkady and the other surviving Russian.As they pass the 'Hermes' Clem...