It’s widely known among fandom folk that during their time together on Doctor Who, their was a somewhat tense relationship between Tom Baker (Fourth Doctor) and Louise Jameson (Leela). But it was during the filming of the first serial of Season 15 – ‘Horror of Fang Rock’ – that this took a turning point.
According to Louise Jameson on the DVD commentary of the 1977 story, a scene in Part 3 was crucial to the behind-the-scenes relationship between her and co-star Tom Baker. In one scene, he consistently came in ahead of his cue, upstaging her. On the grounds that this move was "not what they had rehearsed" she insisted on three successive retakes until he came in at the rehearsed time. This apparently won his respect. From that point forward, Jameson says, their working relationship was much smoother.