| 3 | - | |
Mystery of the Flying Express | 3 | - | |
The Secret of Pirates' Hill | 3.33 | - | |
| 3 | - | |
| 3.72 | - | |
The Mystery of the Spiral Bridge | 3 | - | |
| 3.3 | - | |
| 3.57 | - | |
The Secret Agent on Flight 101 | 2.67 | - | |
The Secret of Skull Mountain | 3 | - | |
The Mystery of the Chinese Junk | 3 | - | |
The Secret of the Lost Tunnel | 3 | - | |
| 3.33 | - | |
The Great Airport Mystery | 3 | - | |
| 3.5 | - | |
| 3 | - | |
What Happened at Midnight | 3.5 | - | |
| 3 | - | |
| 3.44 | - | |
| 3.29 | - | |
The Viking Symbol Mystery | 3 | - | |
| 3 | - | |
The Hidden Harbor Mystery | 3 | - | |
| 3 | - | |