Aired 6 years ago - Nov 13, 2017
A deadly disease is spreading around the world, and the travelers must get to the bottom of where it came from and how to stop it, before it's too late.
Mouse over thumbnail for slideshow
Or scroll and see one by one:
#3
#11
#12
#13
#14
#16
#18
#19
#24
#26
#33
#34
#36
#37
#38
#44
#47
