She was in the Stephen King Miniseries Rose Red (Which served as her debut in television) as well as played Charlie Sheen's psychotic neighbor in Two and a Half Men.
Ah, I did see Rose Red. Been awhile, though.
I haven't seen any of the programs you mentioned, but did recognize the actress who plays Molly from the earlier seasons of Two and a Half Men.
That show was not on my TBW list so...