Criminals are motivated by greed. But Father Stanley Unwin answers to a higher source... Her Majesty's Secret Service. He's a man of considerable ability who's greatest assets are an honest face and the Minimizer; a top-secret shrinking device. With the help of his trusted assistant, Matthew, Father Unwin fights the big crimes in a small way. Join the crime fighter who's one of a kind in - The Secret Service,
Season One: 13 episodes
| Ep | PN | Airdate | Title | 
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| 1 | 101 | Sep 21/69(UK) | A Case For the Bishop | 
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| 2 | 102 | Sep 28/69(UK) | A Question of Miracles | 
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| 3 | 103 | Oct 12/69(UK) | The Feathered Spies | 
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| 4 | 104 | Oct 05/69(UK) | To Catch a Spy | 
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| 5 | 105 | Oct 19/69(UK) | Last Train to Bufflers Halt | 
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| 6 | 106 | Nov 09/69(UK) | Errand of Mercy | 
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| 7 | 107 | Nov 16/69(UK) | The Deadly Whisper | 
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| 8 | 108 | Oct 26/69(UK) | Hole in One | 
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| 9 | 109 | Nov 02/69(UK) | Recall to Service | 
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| 10 | 110 | Nov 23/69(UK) | The Cure | 
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| 11 | 111 | Nov 30/69(UK) | School For Spies | 
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| 12 | 112 | Dec 07/69(UK) | May-day, May-day! | 
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| 13 | 113 | Dec 14/69(UK) | More Haste, Less Speed | 
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