The Sixth Doctor (Colin Baker) is working the controls in the TARDIS, and he accidentally teleports his former companion Tegan Jovanka (Janet Fielding) on board.

In the Bred for War DVD Extra found in "The Two Doctors", Colin Baker said, "Jimmy Savile is much more frightening than the Sontarans."

In an article for Bucks Free Press on 9 November 2012, Baker wrote:[1] Janet Fielding was asked to participate in the sketch in place of Nicola Bryant as the current companion, Peri Brown.

[3] "A Fix with Sontarans" was broadcast during the run of The Two Doctors (on the same day as Part 2) and is featured as an extra on the DVD release of that story.

The Blu-ray release includes a commentary track with Colin Baker, Janet Fielding, and a now-adult Gareth Jenkins, where they discuss the production with moderator Toby Hadoke.