http://nhw.livejournal.com/1145131.html?#cutid2

McIntee has managed to flesh out the future galactic federation with Draconians, Terileptils and a hexapod from Alpha Centauri; he brings the Doctor, Jamie and Victoria there straight from an adventure with the Menoptera on Vortis; and of course most gloriously he brings in a bearded gentleman called Koschei who has his own Tardis and (this is hardly a spoiler) by the end of the story has decided to call himself "the Master" in future.

Added to all of this, the plot actually makes sense! We have an isolated human colony under investigation by both Federation and alien fleets, and OK, we end up with a story that has certain similarities to Colony In Space except that it is better. Of course Koschei (the future Master) wants to seize control of the secret at the heart of the colony, and the Doctor must prevent him; but matters are complicated by the fact that Koschei has an assistant who is not aware of what he is up to, and who is herself not entirely what she seems. Giving him a travelling companion is a great idea, and it's amazing that it took the TV series until 2007 to do so (and then Lucy Saxon is not quite the same thing). All very good fun. ( )