
| Universe : | Prime Timeline | 
| Name : | Peak transitional threshold [1] | 
| Canon source | Backstage source | Novel source | DITL speculation | 
| # | Series | Season | Source | Comment | 
| 1 | Generic official information | 
| Series : | Season | 
| Episode : | Generic official information | 
| © Graham & Ian Kennedy | Page views : 17,307 | Last updated : 1 Jan 1970 |