| Title | Season | Episode # | First Aired |
|---|---|---|---|
| The Clue In the Embers | 2 | 18 | Monday September 7, 1970 |
| The Clue of the Screeching Owl | 2 | 19 | Monday September 14, 1970 |
| The House On the Cliff | 2 | 20 | Monday September 21, 1970 |
| Mystery Of the Spiral Bridge | 2 | 21 | Saturday October 3, 1970 |
| The Yellow Feather Mystery | 2 | 22 | Saturday October 10, 1970 |
| The Mystery Of Devils Paw | 2 | 23 | Saturday October 17, 1970 |
| The Sinister Sign Post | 2 | 24 | Saturday October 24, 1970 |
| The Melted Coins | 2 | 25 | Saturday October 31, 1970 |
| The Mark On The Door | 2 | 26 | Saturday November 7, 1970 |
| The Flickering Torch Mystery | 2 | 27 | Saturday November 14, 1970 |
| The Haunted Fort | 2 | 28 | Saturday November 21, 1970 |
| The Mystery of Wildcat Swamp | 2 | 29 | Saturday November 28, 1970 |
| The Clue of the Broken Blade | 2 | 30 | Saturday December 5, 1970 |
| Hardy Boys Episode Thirty-One | 2 | 31 | Saturday December 12, 1970 |
| The Short Wave Mystery | 2 | 32 | Saturday December 19, 1970 |
| The Hooded Hawk Mystery | 2 | 33 | Saturday December 26, 1970 |
| Pirate's Hill | 2 | 34 | Saturday January 2, 1971 |