For those people in the US who want to see Tenko again (or even for the first time as I don't know if it was ever on PBS), you can simply order it from Amazon.co.uk and have it sent over. It will take about a week to arrive. Make sure that you have a multi-region DVD player though! I have almost finished with the last season, and it is as good as I remember - perhaps even better. For those new to this series, the first episode of season 1 is a bit clunky, but give it time and space.
The story and characters evolve through 3 prison camps in seasons 1 and 2. I still get chills down my spine remembering the revelation of how Rose was betrayed in season 2.
Season 3 records the end of the war and the difficulties adjusting to a new life of freedom (??).
The third season DVD set also includes the reunion, set in 1950.
I think each season of Tenko is best seen continuously - say over a weekend. It is like reading a good book. But give it time between seasons. In many ways, each season is self-contained. Best to give it at least a few days between them.
Invest in this series. You will be ever grateful that you did.