Warlock's Cross

I've started the drabbles for the Seventh Doctor story "Warlock's Cross" by Steve Lyons. There's are some things I like about this audio, but there's a particularly cliche character (Colonel McKenna) who sounds like every obnoxious, stupid, arrogant military character you've ever watched/read/heard and he really annoys me. He is, however, offset somewhat by Blake Harrison who plays reoccurring character Daniel Hopkins. One day, when I have time, I'll write a bit more about Daniel Hopkins and what makes him an interesting almost-companion for the Doctor.

I've also started brainstorming for Project: Poetry Fic Challenge/Hill House Eight (which will not end up being its actual title). Question for you all: in a situation where you're adding characters from a different fandom to another fandom's story, should their addition fundamentally change the ending of the story? Is there any point in adding them if they don't? It's a question I've been going around and around with myself about today and I haven't come up with an answer. I'd be interested to hear what you all think.