| #675 | Revolutionary | Dec 14, 2009 |
| #674 | Natural Parenting | Dec 11, 2009 |
| #673 | The Sun | Dec 9, 2009 |
| #672 | Suggestions | Dec 7, 2009 |
| #671 | Stephen and Me | Dec 4, 2009 |
| #670 | Spinal Tap Amps | Dec 2, 2009 |
| #669 | Experiment | Nov 30, 2009 |
| #668 | Pandora | Nov 27, 2009 |
| #667 | SkiFree | Nov 25, 2009 |
| #666 | Silent Hammer | Nov 23, 2009 |
| #665 | Prudence | Nov 20, 2009 |
| #664 | Academia vs. Business | Nov 18, 2009 |
| #663 | Sagan-Man | Nov 16, 2009 |
| #662 | iPhone or Droid | Nov 13, 2009 |
| #661 | Two-Party System | Nov 11, 2009 |
| #660 | Sympathy | Nov 9, 2009 |
| #659 | Lego | Nov 6, 2009 |
| #658 | Orbitals | Nov 4, 2009 |
| #657 | Movie Narrative Charts | Nov 2, 2009 |
| #656 | October 30th | Oct 30, 2009 |
| #655 | Climbing | Oct 28, 2009 |
| #654 | Nachos | Oct 26, 2009 |
| #653 | So Bad It's Worse | Oct 23, 2009 |
| #652 | More Accurate | Oct 21, 2009 |
| #651 | Bag Check | Oct 19, 2009 |
| #650 | Nowhere | Oct 16, 2009 |
| #649 | Static | Oct 14, 2009 |
| #648 | Fall Foliage | Oct 12, 2009 |
| #647 | Scary | Oct 9, 2009 |
| #646 | Conversations | Oct 7, 2009 |
| #645 | RPS | Oct 5, 2009 |
| #644 | Surgery | Oct 2, 2009 |
| #643 | Ohm | Sep 30, 2009 |
| #642 | Creepy | Sep 28, 2009 |
| #641 | Free | Sep 25, 2009 |
| #640 | Tornado Hunter | Sep 23, 2009 |
| #639 | Lincoln-Douglas | Sep 21, 2009 |
| #638 | The Search | Sep 18, 2009 |
| #637 | Scribblenauts | Sep 16, 2009 |
| #636 | Brontosaurus | Sep 14, 2009 |
| #635 | Locke and Demosthenes | Sep 10, 2009 |
| #634 | Date | Sep 9, 2009 |
| #633 | Blockbuster Mining | Sep 7, 2009 |
| #632 | Suspicion | Sep 4, 2009 |
| #631 | Anatomy Text | Sep 2, 2009 |
| #630 | Time Travel | Aug 31, 2009 |
| #629 | Skins | Aug 28, 2009 |
| #628 | Psychic | Aug 26, 2009 |
| #627 | Tech Support Cheat Sheet | Aug 24, 2009 |
| #626 | Newton and Leibniz | Aug 21, 2009 |