Making the Kipper of Traken was a trailer for the Doctor Who Season 23 Blu-ray release.
Summary
Celebrating the release of "Season 23: The Collection", former companions Sarah Sutton (Nyssa) and Janet Fielding (Tegan Jovanka) resurrect a long-forgotten recipe from The Doctor Who Cookbook...
Notes
"Kipper of Traken" is a pun on Keeper of Traken.