1. Whatever Happened To Peri?
Finally we get to Miss Perpugilliam Brown, who suffered possibly the worst fate to befall any companion - she was taken off and married to Brian Blessed's King Yrcanos. This was, of course, preferable to the timeline that arose because The Doctor was taken to the trial; Peri had her hair shaved and was readied to have her mind wiped to accommodate the mind of Kiv (a Mentor). Following the mind transfer, Peri's body was then shot and she was killed. Poor Peri: a poor end to a popular companion. Big Finish revisited this in the story Peri and the Piscon Paradox in which we learn that the Timelords interfered in Peri's timeline several times and that there are several versions of Peri in history. All very confusing.
There you have it, my list of legacies - agree, disagree? What have I missed? Let me know in the comments section below.