A spy is looking for his old colleague who now works for the other side.

Based on true events, an American submarine collides into a Soviet sub of the coast of America and an ensuing standoff occurs that could lead to total annihilation.

1992 BBC adaptation of the Joseph Conrad novel of 1907 concerning the mostly inactive spy Alfred Verloc, who is ordered by his superior Mr Vladimir to carry out a terrorist act. Verloc reluctantly plans the operation, seeking help from The Professor. Verloc is also an informant for the police and the Assistant Commissioner and Chief Inspector Heat add additional pressure on Verloc and his attempts to carry out his plan. Verloc’s subsequent actions gravely affect his wife who is devoted to her mentally unbalanced brother Stevie.