For the very first time ever, Gallifrey and the 3WA have a liaison officer. Subaltern Allison V Prydonia is a youngish (130) time lady and the youngest Councilor. This tale tells of her very first combined 3WA/Gallifreyan mission aboard her new 'flagship' and her new TARDIS. This will be the final 'rift in time' sequel which began so many yrs back w/ 'Xmas w/ the Dirty Pair.
From the episode when they all said goodbye to each other and right before The Dirty Pair left.