SERIES PREMIERE: Bradley Whitford, finding new shades of character to explore since shining in The West Wing, has made a specialty of late playing mercurial, mysterious men in both The Handmaid’s Tale and the Jordan Peele movie Get Out. But here, he lightens up, playing a washed-up former Princeton music professor who, for rather petty reasons, decides to help a local vocal small-town choral outfit square off against a dominant singing adversary. Whitford is d