53x6season x episodeThe Nature of ThingsThe Nature of Things ( 53 x 6 )Untangling Alzheimer'sNov. 14, 2013
53x5season x episodeThe Nature of ThingsThe Nature of Things ( 53 x 5 )Invasion of the Brain SnatchersOct. 31, 2013
53x4season x episodeThe Nature of ThingsThe Nature of Things ( 53 x 4 )Brain Magic: The Power of PlaceboOct. 24, 2013
43x5season x episodeThe Nature of ThingsThe Nature of Things ( 43 x 5 )Biomimicry: Learning From Nature: Part INov. 14, 2002
43x4season x episodeThe Nature of ThingsThe Nature of Things ( 43 x 4 )Years From Here: the Maisin visit the Stó:loNov. 07, 2002
43x3season x episodeThe Nature of ThingsThe Nature of Things ( 43 x 3 )A Madman's JournalOct. 31, 2002
43x2season x episodeThe Nature of ThingsThe Nature of Things ( 43 x 2 )Flight of the Whooping CraneOct. 24, 2002
43x1season x episodeThe Nature of ThingsThe Nature of Things ( 43 x 1 )Up Close and ToxicOct. 17, 2002
42x13season x episodeThe Nature of ThingsThe Nature of Things ( 42 x 13 )Cyberman: Canada's Original CyborgMar. 12, 2002
