Set in Series B (after the death of Gan) the remainder of the B7 crew (Blake, Jenna, Avon, Vila & Cally) investigate rumours of a mysterious Federation project called Archangel.
Again this is a really high quality story with a plot that unfolds just like an episode of the show. You really do feel like you could be watching this one.
The characters are all on point: Avon, Servalan, Blake, Vila... Heck even Jenna gets a little bit of action. My only niggle is the complete uselessness of Cally - She is utterly wasted in this one and I feel that is really bad oversight. We're dealing with a group of cyborgs who communicate telepathically - there's some suggestion of a hive mind and we certainly get chunks of them interacting mentally with 'the program' - Cally is the ideal choice to play a central role here - she could communicate with them, heck at least sense their consciousness but that idea doesn't ever get used.
Other than that though, I really liked this. I particularly love the nature of the project - the next step up from mutoids seems very plausible and the possible application of fusing them with ships... is a concept I find fascinating.
The continuity/B7 universe is solid in this as well. We get a mention of Jenna's friend Virna who crops up in the Liberator Chronicle 4.2: Epitaph, and we get a Gauda Prime Blake epilogue in which he encounters and helps Katri Tam. This one feels very Blake's 7 not only in good depiction of character, but in the representation of the Federation, technology and the nature of the project.
Lastly I also like the way this is written - we get various flashbacks 'artefacts' from different perspectives, and cut scenes which help the pace and make it feel even more like an episode script.
So far I'm highly impressed with the Big Finish B7 spin off range, it's of much higher quality and consistency than a lot of other sci-fi show tie-in fiction. It rarely feels rushed and you get the feeling that the writers are as much fans of the show as the readers. Archangel is a good example.