The Doctor arrives on a science station where experiments are being performed on the Vashta Nerada to modify them for various uses. A saboteur turns the entire facility deadly as he tries to escape with a few to sell them.

This story has a lot going for it. The writer comes up with a lot of imaginative variations on these airborne piranhas that are explored briefly. There is definitely feeling of a disaster film with plenty of suspense and a sense of real peril.

Cardinal Ollistra's presence is actually a bit of a negative. While Jacqueline Pearce turns in a good performance. The way Ollistra's written she just comes off as whiny and unreasonable. It also doesn't help matters that many of the problems are caused by a station director who doesn't know her way around the station. Overall though, it's still an exciting and well-paced story.

This brings the mini-arc of the search for Ninestein's replacement to an end as there's only one clone left, but he's gone into hiding to avoid being wiped and is also pacifist. Zelda has an evil plan to take advantage of Threestein's good nature. Will he be easily played into betraying the Terrahawks?

This episode is fairly good and Twostein is likable. He's shown to have many of the same positive traits as Ninestein without all the negativity. It's an interesting choice and it'll be fun to see how it plays out over the rest of the series.

The Doctor lands in a village in the 1980s which is about to burn three witches. He stops the proceedings only to discover these are aliens he's never met before. Now he's got to stop him.

The Sixth Doctor is a perfect match for the Carrionites with his strong love of the English language and ability to use it. The Carrionites are also a great menace, and without a doubt Katy is the best substitute companion in the box set. I also liked the beginning where the Doctor tries his hand at being a clown as party organizers mistook him for it.

The story is a lot of fun, with some a mix of funny, clever, and scary moments. It does a somewhat darker tone about life in General and the Sixth Doctor's life specifically than his ever had on television or at Big Finish. Still, this is the best story of the set.

After the events of Frontier in Space, the Doctor and Jo land on Spiridon and discover a detachment of Thals having arrived to stop the latest insane Dalek plan which involves invisibility as part of their big galactic invasion.

In many ways, this is a pretty direct callback to the Doctor's first encounter with the Daleks in the first season as the plot follows many of the same notes with hapless Thals, and the various evil methods of the Daleks. This isn't an outstanding Dalek story, but it's an interesting enough action adventure story to make it an enjoyable, with just enough clever twists thrown in to make it interesting. There's also some foreshadowing of Jo's decision in the Green Death in this story.

Overall, not great, but enjoyable enough.