| Universe : | Prime Timeline |
| Name : | Delta wave frequency [1] |
| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | VOY | 6 | Riddles |
| Series : | VOY Season 6 |
| Episode : | Riddles |
| © Graham & Ian Kennedy | Page views : 19,355 | Last updated : 1 Jan 1970 |