Interesting story this one. Almost two interweaving stories here - the dynamics of the Doctor, Peri and Erimem following on from their previous adventures, plus what is going on with the colony they have found. As the plot unfolds, it slowly becomes apparent that really quite some evil stuff going on here. Interesting society as such that has formed in the colony as a consequence of prior actions / history, and I think it is portrayed well with the colony characters here, and I found myself quite sympathetic for them. Doctor and Erimem strong in this story, but for Peri, while not bad, at times she came across somewhat unsympathetic or naive towards some of the challenges the colonists were actually facing, which I found slightly out of character. Overall though a good listen.