Watch Online Free on Watchseries. Following the events of “ZOMBIES 4: Dawn of the Vampires,” the newfound peace between the Daywalkers and Vampires is put to the test when a band of fierce mermaids arrives in Rayburn, making waves and casting a persuasive siren song to lure in new allies. Nova and Victor must unite their groups once more to discover what the mermaids are really after in order to protect the fragile harmony they worked so hard to build. Expected 2027.