At the begining of the first scene in this, the final act, there is a serious speach spoken by Leonato to his brother Antonio about how very sad he is regarding the "death" of Hero. He and the audience both know, however, that Hero is not really dead, but mearly pretending in order to force Claudio to calm down and regret what he did to her. It follows that Leonato is instead most probably grieveing over the loss of his dignity after Claudio publicly insulted him and his daughter. In the time that has passed in between act four, scene one and this scene, Leonato has changed his mind as regarding Hero's innocence, as evidenced in line 42 where his "soul doth tell" him "Hero is belied". Maybe if he had come to that conclusion during the accusations he could have defended his daughter rather than wishing death upon her, then the whole odd situation where she has to pretend to be dead would never have happened...
From line 46 to line 108, Leonato and Antonio confront and challenge Claudio and Don Pedro about the "slandering" of Hero. What starts off the angry exchange of words is a simple piece of punctuation! An exclamation mark! This happens in line 47, when Leonato exclaims "hear you, my lords!". Without the "!", that sentence would have just been like any other and pressumably the "my lords!" bit at the end wouldn't have been taken as an insult. In line 53, Leonato calls Claudio a "dissembler", showing that he meant to insult him earlier, but Claudio is evidently not taking his (literally) old friend seriously, as he "jests" by pretending to reach for his sword. Naturally, though, this action has the effect of making Leonato angry, angry enough to spend fourteen lines explaining why he is angry, with an exclamation mark at the end, of course! If you thought that Leonato was cross, then he was nothing, NOTHING, compared to his brother Antonio, because Antonio didn't know that Hero wasn't really dead. Instead of Leonato challenging the young lords to a duel over his and his family's honor, Antonio is challenging who he sees to be the murderers of his niece and so is downright furious with them! He's so furious that in line 91 he insults them five times in the same line, "Boys, apes, braggarts, Jacks, milksops!". These insults are probably intended to sound serious in the play, but that line, it has to be said, reminds me of Captain Haddock's long streams of wierd insults in the Tintin books, which are used for comic effect. More appropriately, think, who are the other characters in the play that use insults, why, Beatrice and Benedick and, as we have already established in earlier scenes, they are comedic characters... Could it be that, if acted in the right way, the Antonio we see in this scene could be the same comedic character we saw briefly from lines 100 to 110 in act two, scene one? If Hero were actually dead, then Antonio's insults would definately be taken seriously by everyone, as they are by the lords, but that not being the case, the raging old man with his Haddock-esque reem of insults seems, dare I say it, down right comic!
After this, the old men leave and Benedick enters. He also challenges Claudio to a duel, calling him a "villain" for "killing a sweet lady". Benedick has been told to do this by Beatrice and the lords guess this and joke about it, leading to a small amount of comedy. The main, overriding theme of the confrontation, however, is one of seriousness, because when the joint most witty character in the play is seriously challenging people to duels, you know that's the way that the entire play is heading! After Benedick has exited the stage, more "comic" characters come onto it, Dogberry (the clown/fool), Verges and the watchmen. To be sure, there is a small slice of comedy when Dogberry (the clown/fool) can't remember his numbers and Claudio copies his number forgetting ways, but after that, it's all serious! Borachio admits being payed 1000 ducats by Don John to pretend to "talk to" Hero, when in fact he is "seeing" Margret, his lady-friend, dressed-up like her. After hearing this, Don Pedro is quick to curse his brother and Claudio is quicker still to fall back in love with Hero, the fickle so-and-so. This quick falling back into Claudio's favour of Hero backs up the point that I made in one of the previous act evaluations about her being an object that Claudio wants to own. It is always bad to treat a person as a means as Claudio does with Hero here and so this is serious...or so it should be, if not for the fact that it takes almost no thought of Claudio's before he desides that he loves her again. If acted in the right way, it could be comedic, but Shakespeare most probably intended it to be sincere.
Claudio insists that Leonato gets his revenge on him for "killing" Hero and insulting Leonato. The revenge, it turns out is to (271) "hang an epitaph upon her tomb" and to marry Antonio's daughter, who, despite these people all knowing eachother for a long time, nobody knew existed. Serious? I THINK so, but it could be comedic because the punishments are so puny for "killing" a woman and insulting the governor!
Act five scene two begins with Benedick asking Margaret to help him write a speach for Beatrice for 24 lines. Benedick is back to his usual comedic self in these few lines and Margaret is surprisingly witty too, leading the audience into a scene of comedy where the two B's find out that challenging Claudio to a duel isn't nesesary after all and that Claudio has admitted that he was wrong in humiliating Hero and Leonato! It also contains Benedick singing, it's that comedic! The comedy in this scene is mainly, however, composed of Benedick and Beatrice's witty conversation, as ever.
The third scene in the act is but 33 lines long and consists of Claudio reading an epitaph (3-11) to Hero's grave and Balthasar singing a song to and about the same. All of this scene is serious and not a comedic element does it involve. As an interesting note, I would like to point out that this scene is said entirely in verse and as I said in the act four evaluation, verse = seriousness and blank verse = comedy.
And so it comes to this, the last scene in the play! This is it people, hold on to your hats, for this is act five, scene four! At the begining of the scene, Benedick asks Leonato's permission to marry Beatrice, Leonato's niece (30). He does so seriously as they love each other at that point. After that, Claudio gets married to "Antonio's daughter" without ever having so much as seen the girl. Could this be Shakespeare commenting on the bizarre and slightly sinister act of arranged marrage? Or could it just be a continuation of the "masked" theme that runs through the play (masked ball, masked love [Benedick & Beatrice and Maragret & Borachio], masked marrage ect.) After Hero unmasks and tells Claudio that she is "another Hero" there is a bit of comedy with Benedick and Beatrice realising that they were tricked into falling for each other but, by Jove, now each actually does love the other. The final line in the play is the serious one in this scene, Benedick says that he will "devise thee brave punishments for him" about Don John. Meaning torture, probably. What a wierd way for a comedy to end, with one of the characters going to be tortured. Sounds more like the ending of a tragady to me!