Theory:K9 television discontinuity and plot holes/Jaws of Orthrus


 * Although K-9 never stated it in previous episodes, Starkey says K-9 comes from the 50th century and all publicity for this series states the same. However K-9 actually came from the 51st century.
 * K-9 came from the year 5000. Depending on how you are defining a century, it could be either.


 * Drake says it took 15'000 hours to create Orthrus, over a year and a half.
 * His statement is of manhours: presumably a reasonably large crew of technicians, engineers, and scientists were directly or indirectly employed.