The second of this season’s new examinations of Shakespeare plays, this hour looks at one of his darkest tragedies, King Lear. Christopher Plummer, one of the play’s veteran stars (pictured), is the guide, and one of the best elements here is how Plummer reflects on the various Lear performances captured on screen. Also, we hear from one of them, Ian McKellen, who was so impressive decades ago, on stage and later on TV, in his 1984 one-man theatrical production, Acting Shakespeare. H