In a street outside Leonato’s house, the town policemen of Messina—collectively called the Watch—gather together to discuss their duties for the night. Dogberry, the head constable, and Verges, his deputy, command and govern them. Dogberry and Verges are well intentioned and take their jobs very seriously, but they are also ridiculous. Dogberry is a master of malapropisms, always getting his words just slightly wrong.
Under Dogberry, the Watch is very polite but not very effective at deterring crime. As Dogberry gives his orders to his men, it becomes clear that the Watch is charged with doing very little. For example, when asked how the men should react should someone refuse to stand in Don Pedro’s name, Dogberry replies, “Why then take no note of him, but let him go, and presently call the rest of the watch together, and thank God you are rid of a knave” (III.iii.
Dogberry gives his men a final order: act particularly vigilant near the house of Leonato, for Leonato’s daughter, Hero, is to be married the next day, and the house is filled with commotion and chaos. After Dogberry and Verges depart, the men they have left behind sit down quietly on a bench and prepare to go to sleep.
Suddenly, the watchmen are interrupted by the entrance of Don John’s associates, Borachio and Conrad. Borachio, who does not see the watchmen, informs Conrad about what has happened this night. Acting on the plan he developed with Don John, Borachio made love to Margaret, Hero’s waiting maid, at the window of Hero’s room, with Margaret dressed in Hero’s clothing. Don Pedro and Claudio, who were hiding nearby with Don John, saw the whole thing and are now convinced that Hero has been disloyal to Claudio. Claudio, feeling heartbroken and betrayed, has vowed to take revenge upon Hero by publicly humiliating her at the wedding ceremony the next day. The watchmen, who have quietly listened to this whole secretive exchange, now reveal themselves and arrest Borachio and Conrade for “lechery,” by which they mean treachery. They haul them away to Dogberry and Verges for questioning.
Dogberry and Verges provide welcome comic relief amid Don John’s evil plotting. Their brand of humor is completely different from that provided by Benedick and Beatrice; while the two witty antagonists spar with a brilliant display of wit, Dogberry and Verges get half their words wrong, providing humor with their ignorance. Yet, like Benedick and Beatrice, they are in their own way good-hearted and sincere, and the humor of both duos, sophisticated and unsophisticated, hinges on punning and verbal display.
Borachio’s account of the events of that night inform us that Don John’s plans have been put into action and that everything is working out as he intended. Once again, however, we are faced with a disturbing element in this action: Claudio and Don Pedro both believe Don John’s claims and are willing to believe that they are watching Hero without investigating the matter more closely or interrogating Hero herself about it. When we see how ready Claudio is to believe that the woman he supposedly is in love with is betraying him, we are likely to be deeply troubled about him, even though we know that the play—being a comedy—has to end happily.
Borachio lists a few factors that might make the deception of Claudio and Don Pedro more understandable. He suggests that we should blame Don John’s “oaths,” which first made Don Pedro and Claudio suspicious of Hero’s guilt; the “dark night, which did deceive them” (III.iii.