Ace wearing period clothes with the jacket over them is iconic and I need more of it right now.

This story does feel like it fits in Seven's era quite well, the mysterious and gothic vibe especially almost reminding me of the setting of Ghost Light (or what I remember of it).

We get some more insight into what's going on behind the scenes here with The Master saying he's been working with one of The Doctor's "future companions", giving some actual reason for his appearance in the previous issue other than fan service.