An agent has been killed at the secret dockyard where submarines are built. Steed investigates, and finds that a foreign spy has been arranging 'accidents' for him.
| Creator | Sydney Newman |
|---|---|
| Actor | Patrick Macnee, Linda Thorson |
| Country | United Kingdom |
| Production | Associated British Picture Corporation |
| Season 1(26 episode) |
|---|
| Season 2(26 episode) |
| Season 3(26 episode) |
| Season 4(26 episode) |
| Season 5(24 episode) |
| Season 6(33 episode) |
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