Spy Games in Watership Down. That's not new, but I think, Spartina is the right rabbit for that job. Even, because no one suspects her (except for Captain Holly). Alright, we can discuss now, why Bigwig doesn't see her as a threat. It may be, because he still got the thinking, that those works must be done by bucks, not does (similar to the digging thing).
And it's cool, that Spartina begins to doubt on her mission, after she reached Watership Down.
And of course, we have the storyline between Campion and Blackberry, what I like really much. And what's really cool is, that Blackberry saved Granite's life; and that she should be judged to death for that.
The fact, that Spartina assigned Granite to kill Blackberry, shouldn't she be back by round moon, put the final touches to this episode.