Episodes
1. Cat and MouseA shocking online video brings together a widespread internet group of animal lovers out for justice. Their target, meanwhile, has more horrors planned.
2. Killing for ClicksA new video pushes panic to the next level, galvanizing the "internet nerds" to intensify their own painstaking investigation as police join the hunt.
3. Closing the NetWith the killer's identity -- and twisted motives -- revealed, the group finds more key clues as the global police manhunt reaches a fever pitch.
