Othello

             Iago also deceives Roderigo. Roderigo believes that Iago is helping him to get Desdemona as his wife but in actual fact, Iago is only using him to his advantage to get him into a fight with Cassio so that he can fall out of favour with Othello and so that Iago can be lieutenant. "Provoke him that he may by the displanting of Cassio." (Act 2 Scene 1, lines 264-269) He foreshadows the downfall of Cassio when speaking to Roderigo and none of the other characters know of this plan. Roderigo believes that this will be to his advantage but the audience knows that Roderigo is being used by Iago. This, once again creates suspense for the audience.
             Iago then next deceives Cassio by acting as his friend and telling him go to Desdemona and make her ask Othello to be reappointed as lieutenant. "Our general's wife is now the general Confess yourself freely to her: importune her help to put you in your place again." (Act 2 Scene 3, lines 304-316) The use of dramatic irony here foreshadows how Othello will react to Desdemona's continual asking for Cassio's reinstatement. .
             One character of importance that Iago deceives is Othello. Iago uses discreetness to make Othello even more curious. The death of Cassio and Desdemona was foreshadowed earlier in the play and the audience knew of Othello and Iago's plan to kill Cassio and Desdemona but nobody else did. This dramatic irony would create suspense and keep the audience aware to what is happening throughout the play.
             The theme of deception was also brought out by asides. "He takes her by the palm. Ay, well said, whisper. With as little a web as this will I ensnare as great a fly .
             as Cassio," (Act 2 Scene 1, lines 164-166) was spoken by Iago and this dramatic irony.
             foreshadows what Iago is going to do to trap Cassio and how he will use Cassio and Desdemona's "relationship" to make Othello jealous.
             Only the audience knows of Iago's plans and they just watch in suspense and disbelief as the plot unfolds and captivates the audience through the use of dramatic techniques keeping them in suspense.