"Love Letters" is one episode that we're reminded just how perfect Moira and Johnny are for each other. When Moira finds handwritten love letters written to Johnny from a mystery woman, she tells everyone that Johnny has a mistress. Of course, it doesn't take long for him to reveal to Moira that she was the author of those racy letters. It's an incredibly sweet episode that often leaves all viewers oohing and awing, while shaking their heads in amusement.