Mel Time and the Rani

The Doctor first meets Mel as a future companion he hasn't met yet, called as a witness at his trial (c) BBC Studios Doctor Who Trial of a Time Lord Mel Bush

Mel (right) helps the Doctor through his regeneration, but has to contend with an imposter! (left). The Doctor stands between two women in identical pink stripey tops and red curly hair, all three smiling(c) BBC Studios

Mel Trial
Mel Power of the Doctor 1