A Time to Stand. It sets up the plot for the whole six part arc perfectly, but it doesn't do as much to establish the material and emotional journeys of the characters. Is that nitpicky? Yes, but little differentiates these episodes from one another.
Rocks and Shoals
Favor the Bold
Sacrifice of Angels
Far Beyond the Stars
In the Pale Moonlight
Rocks and Shoals
Favor the Bold
Sacrifice of Angels
Far Beyond the Stars
In the Pale Moonlight