The Tempest, now playing at the Allen Elizabethan Theatre, may be Shakespeare’s swan song, the last play he wrote without collaborators. Some scholars suggest that the leading character, Prospero, represents Shakespeare himself.As directed by Nicholas Avila, this production, although traditional in style, focuses on enslavement, represented by Ariel, a bird-like sprite played by Geoffrey Warren Barnes, and Caliban, portrayed by James Ryen as a half-human monster, yearning not only to be free, but to be respected.