Season 1 (1971)
6.80 avg 13 episodes 7.6 → 7.3 51 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | A Message from the Deep Sea | 7.6 | 158 |
| 2 | The Missing Witness Sensation | 7.1 | 128 |
| 3 | The Affair of the Avalanche Bicycle & Tyre Co. Ltd. | 5.9 | 112 |
| 4 | The Duchess of Wiltshire's Diamonds | 7.2 | 120 |
| 5 | The Horse of the Invisible | 6.5 | 141 |
| 6 | The Case of the Mirror of Portugal | 6.3 | 96 |
| 7 | Madame Sara | 6.6 | 94 |
| 8 | The Case of the Dixon Torpedo | 6.2 | 84 |
| 9 | The Woman in the Big Hat | 6.9 | 94 |
| 10 | The Affair of the Tortoise | 6.9 | 83 |
| 11 | The Assyrian Rejuvenator | 6.6 | 82 |
| 12 | The Ripening Rubies | 7.3 | 86 |
| 13 | The Case of Laker, Absconded | 7.3 | 79 |