Creation of suspense in Othello

"By Heaven, that should be my handkerchief ( IV,i,148)!"

This quote from Othello in Act 4 reveals how suspense is created the play. Usually, suspense is created by the reader, or in this case, the audience, being left in the dark. But, in Othello, suspense is created by the main characters being clueless to what is really happening. The suspense comes to its peak in the last act, last scene of the play where most of the cast ends up dead. As the pawns Othello, Roderigo, and Cassio do Iago's dirty work, he sits back and the audience is wondering when/if he will be found out. Not until the very last scene does his plan come to fruition, then blow up in his face. It had all gone well had Emilia kept her mouth shut.