National Geographic Explorer - Seasons (5)

Season 1 (Number of Episodes - 17)
Oct 12, 2003
Season 2 (Number of Episodes - 18)
Jan 17, 2005
Season 3 (Number of Episodes - 16)
Aug 16, 2006
Season 4 (Number of Episodes - 18)
Aug 8, 2007
Season 5 (Number of Episodes - 17)
Sep 2, 2008