I think she was married to the guy who played Dick Winters in band of brothers.
I watched the first few seasons. One season started out a little hyped like it had become a caricature of itself. May need to go back and work through the first few episodes of that season. Maybe it warms back up.
Yup, "Polly" was Mrs Damon Lewis. she died of cancer, was 52 years old.
and yeah, the guy playing Arthur is GREAT. damn good actor.