In Episode 3- of the series, it is interesting to note that when the New York Times receive a letter from the Unabomber. FBI supervisory, Joel Moss states that there was no 'good forensic evidence' for the FBI to go on until they see the Nathan R imprint. However 6 minutes 13 seconds in there is a stamp with a panda saying 'do something wild'. I would have thought that may have been a key clue given that earlier in the documentary they were trying to connect 'Wood' (victim) also material used in the bomb making, could well have lead them to check more rural habitant areas. It's also criminal (excuse the pun!) that there is no mention of James R. Fitzgerald, (criminal profiler/forensic linguist) as he was arguably key to solving the entire case!