| Season 1 | |
| 1x5 | Bigfoot |
| 1x7 | Earthquakes |
| 1x13 | Learning ESP |
| 1x25 | In Search of Ancient Mysteries |
| Season 2 | |
| 2x8 | The Ogopogo Monster |
| 2x13 | Anastasia |
| Season 4 | |
| 4x2 | Carlos, the Most Wanted Man in the World |
| 4x3 | The Amityville Horror |
| 4x11 | D.B. Cooper |
| 4x23 | Glenn Miller |
| Season 5 | |
| 5x12 | Laugh Therapy |
| 5x21 | The Hindenburg Mystery |