This episode features a Special Guest appearance of K9, who is of course referring to being left with various different assistants of the Doctor:

• Mark I - left with Leela.
• Mark II - left with Romana.
• Mark III - given as a gift to Sarah Jane Smith (subsequently heroically destroyed, and she got the Mark IIIb - the current K9 - as a replacement)

Artoo is talking about the events of the first Star Wars film "A New Hope" where neither he, Threepio or Chewwie were awarded medals.

Marvin is talking about the events of "Hitch Hiker's Guide to the Galaxy" and "The Resturant at the End of the Universe" mainly. But much worse happens to him...

This episode does not yet have a transcript.