Have you ever heard a sound and not quite known what it is? It can be irritating and even unsettling. Now, imagine a lot of people in the same town begin to hear that sound? A hum – one that certainly merits further investigation. Enter self-professed slacker and Omagh-native, Phil Taggart, to get to the bottom of it all. A hard-nosed investigative journalist he is not, but there is no better man to examine the characters and quirks of the county Tyrone town where the strange sounds have been emanating. Across three episodes, Phil meets shopkeepers, scientist, comedians, councillors and musicians, all with a view to uncovering the source of the hum. In Episode Two, things take a turn for the weird. The people of Omagh’s imagination runs wild as aliens, wind turbines and secret army activity are all cited as sources of the hum. Phil and his side-kick Muck, turn to man-of-science, Dr Glen MacPherson, for a more grounded answer but are literally left with a headache by what the World Hum expert has to tell them.