In Shakespeare's "Othello," Iago plotted to assassinate which person under Othello's command and failed?
Roderigo:  When the assassination of Michael Cassio runs amiss, Iago fatally wounds Roderigo. Michael Cassio:  In the play, Cassio is a young and handsome lieutenant under Othello's command who becomes one of Iago's several victims in a plot to ruin Othello.
Michael Cassio