Otherworldly drama has had a special place in TV fans' hearts since the days of Buffy The Vampire Slayer and Charmed. Fiction has gradually evolved vampires and werewolves from malevolent and hostile creatures to being compassionate near-human heroes.
True Blood has changed the way we perceive vampires. It went from portraying vampires as a minority class to a world where they live openly and somewhat amicably with humans, fairies and werewolves. Seasons 2 and 3 of True Blood garnered the highest spike of interest the series has ever seen, more than double of Season 1. Despite its devoted fan following, though, online interest in the current and final season has dwindled, as you can see in this Google Trends graph (Google normalizes its graphs so the peak search activity has a value of 100).
Supernatural, on the air for almost a decade, has seen nothing but substantial growth in interest and a rise in devoted (and vocal) fans. Google Trends shows ebbs and flows that roughly correspond to the length of its seasons, but a generally rising line that peaked at the start and finish of the recently concluded Season 9.
For 2014 alone, American Horror Story: Coven and True Blood have the highest peaks, but fellow monster shows Supernatural, The Vampire Diaries and Teen Wolf have drawn more consistent search volume, as evidenced in the bar graph at the left.