Typical plot lines involve Hercules and Iolaus, or Salmoneus, saving rustic villagers from monsters, evil warlords or the often selfish whims of the gods. In the earlier episodes, as mentioned in the show's opening title, Hercules' main nemesis is his evil stepmother Hera, who seeks to destroy Hercules using various monsters, because he is a reminder of her husband Zeus' infidelity. As the series progressed, a wider range of enemies was used; notably, the malicious Ares, god of war, replaced Hera as the show's primary antagonist. Towards the end of the series Ares is himself replaced by the evil god, Dahak, who is the main villain in the show's fifth season and sets off a story arc that has Hercules traveling to Sumeria, Norseland and Éire. Although Zeus, Hercules' father, is frequently cited by Hercules as a neglectful father, Zeus' love for Hercules is well-documented in the show. Indeed, Hercules is often referred to as "the favorite son of Zeus". Zeus makes several appearances on the show, even saving his son's life and restoring his superhuman strength on one occasion when he needs it the most. Hercules, for his own part, is always there for Zeus when his father needs him, and in the end, Hercules reconciles with his father and buries whatever issues he has with the father he has come to understand and love.