The cast of this story is fantastic, of particular note is David Tennant, appearing here, before he had played the Doctor, as Kurtz, a particularly nasty Nazi officer, who makes for a very menacing villain. I really enjoyed Sophie Aldred's performance here too, her anger at the Nazis and determination to escape is played very well, her scenes with Tennant being a highlight.

The story itself is fantastic, there's not much I can say without spoilers, but it doesn't go where I expected it to, and the twists throughout keep it engaging from start to finish.