Helen, who embarks on a passionate affair with a man who has no idea what her secret identity is. Caught in the crosshairs when her lover falls victim to the dangerous London underworld, Helen's employer's call in Sam to protect her.

A dramatization of the true story of one of the worst man-made catastrophes in history, the catastrophic nuclear accident at Chernobyl. A tale of the brave men and women who sacrificed to save Europe from unimaginable disaster.

Four friends with a long-standing -- but strained -- connection take a hiking trip into the Swedish wilderness, from which they may never return.