Saturday, November 21, 2009
| Time | Show |
| 1 a.m. | Newshour With Jim Lehrer |
| 2 a.m. | Nightly Business Report |
| 2:30 a.m. | Tavis Smiley |
| 3 a.m. | Hard Problems: The Road To The World's Toughest |
| 4 a.m. | N Is A Number: A Portrait Of Paul Erdös |
| 5 a.m. |
Nova
Becoming Human: Last Human Standing |
| 6 a.m. | Secrets Of Shangri-la |
| 7 a.m. | Lost Cave Temples |
| 8 a.m. | History Detectives |
| 9 a.m. | Hard Problems: The Road To The World's Toughest |
| 10 a.m. | N Is A Number: A Portrait Of Paul Erdös |
| 11 a.m. |
Nova
Becoming Human: Last Human Standing |
| noon | Secrets Of Shangri-la |
| 1 p.m. | Lost Cave Temples |
| 2 p.m. | History Detectives |
| 3 p.m. | Gearing Up |
| 4 p.m. |
Scientific American Frontiers
Chimps R Us |
| 5 p.m. |
Nova
Becoming Human: Last Human Standing |
| 6 p.m. | Secrets Of Shangri-la |
| 7 p.m. | Lost Cave Temples |
| 8 p.m. | History Detectives |
| 9 p.m. | Gearing Up |
| 10 p.m. | Secrets Of Shangri-la |
| 11 p.m. | Lost Cave Temples |
