Watch Online Free on Watchseries. Based, in part, on Shakespeare's The Merry Wives of Windsor, Falstaff is Verdi's last work for the stage - and only his second comic opera. And yet the humour in this multilayered masterpiece is distinctly wry, for all the main characters exhibit an array of human weaknesses that are implacably exposed by Verdi and his librettist Arrigo Boito.