Romana realizes her time with the Doctor is nearing an end, and the divisive character Adric enters the picture in this fan-written Season 18 story. While it remains a solid tale of ‘truths lost to time’, we also see a lot of nods to past stories (‘The War Games’ and ‘The Invasion of Time’ most notably), and some scenes of anger from Tom Baker that are rather alarming in their ferocity.
Oh, and K-9 gets bashed around. Again. And repaired. Again.