1. Cat and Mouse

7.4

. 18 December 2019. 65 min

A 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 Clicks

7.4

. 18 December 2019. 57 min

A 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 Net

6.6

. 18 December 2019. 63 min

With the killer's identity -- and twisted motives -- revealed, the group finds more key clues as the global police manhunt reaches a fever pitch.