Non-fiction television programs

Yee, M. Moving image materials, 1988 (nonfiction: USE Documentaries and factual works; use for films and programs which depict actual persons and/or events. Exclude frank historical re-creations, but do not attempt to judge the "truth" of the depiction in a film purporting to be factual or documentary in nature)
ShareTV website, Dec. 12, 2012: TV Networks > National Geographic Channel (TV Networks » National Geographic Channel National Geographic Channel, also commercially abbreviated as Nat Geo, is a subscription television channel that airs non-fiction television programs produced by the National Geographic Society.)
Best non-fiction TV shows, via Ranker website, Dec. 12, 2012 (non-fiction shows on television; non-fiction TV series; non-fiction television shows; non-fiction television programs; TV series in the non-fiction genre)