| Title | Season | Episode # | First Aired |
|---|---|---|---|
| The Secret of the Caves | 1 | 5 | |
| The Secret of the Old Mill | 1 | 6 | |
| The Secret Warning | 1 | 3 | |
| The Shore Road Mystery | 1 | 15 | |
| The Short Wave Mystery | 2 | 32 | Saturday December 19, 1970 |
| The Sign Of the Crooked Arrow | 1 | 17 | |
| The Sinister Sign Post | 2 | 24 | Saturday October 24, 1970 |
| The Viking Symbol Mystery | 1 | 4 | |
| The Yellow Feather Mystery | 2 | 22 | Saturday October 10, 1970 |
| What Happened At Midnight | 1 | 16 |
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