| #582 | Brakes | May 11, 2009 |
| #581 | The Race: Part 5 | May 8, 2009 |
| #580 | The Race: Part 4 | May 7, 2009 |
| #579 | The Race: Part 3 | May 6, 2009 |
| #578 | The Race: Part 2 | May 5, 2009 |
| #577 | The Race: Part 1 | May 4, 2009 |
| #576 | Packages | May 1, 2009 |
| #575 | Tag Combination | Apr 29, 2009 |
| #574 | Swine Flu | Apr 27, 2009 |
| #573 | Parental Trolling | Apr 24, 2009 |
| #572 | Together | Apr 22, 2009 |
| #571 | Can't Sleep | Apr 20, 2009 |
| #570 | New Car | Apr 17, 2009 |
| #569 | Borders | Apr 15, 2009 |
| #568 | Well 2 | Apr 13, 2009 |
| #567 | Urgent Mission | Apr 10, 2009 |
| #566 | Matrix Revisited | Apr 8, 2009 |
| #565 | Security Question | Apr 6, 2009 |
| #564 | Crossbows | Apr 3, 2009 |
| #563 | Fermirotica | Apr 1, 2009 |
| #562 | Parking | Mar 30, 2009 |
| #561 | Well | Mar 27, 2009 |
| #560 | Lithium Batteries | Mar 25, 2009 |
| #559 | No Pun Intended | Mar 23, 2009 |
| #558 | 1000 Times | Mar 20, 2009 |
| #557 | Students | Mar 18, 2009 |
| #556 | Alternative Energy Revolution | Mar 16, 2009 |
| #555 | Two Mirrors | Mar 13, 2009 |
| #554 | Not Enough Work | Mar 11, 2009 |
| #553 | Pirate Bay | Mar 9, 2009 |
| #552 | Correlation | Mar 6, 2009 |
| #551 | Etch-a-Sketch | Mar 4, 2009 |
| #550 | Density | Mar 2, 2009 |
| #549 | Westley's a Dick | Feb 27, 2009 |
| #548 | Kindle | Feb 25, 2009 |
| #547 | Simple | Feb 23, 2009 |
| #546 | Music DRM | Feb 20, 2009 |
| #545 | Neutrality Schmeutrality | Feb 18, 2009 |
| #544 | Pep Talk | Feb 16, 2009 |
| #543 | Sierpinski Valentine | Feb 13, 2009 |
| #542 | Cover-Up | Feb 11, 2009 |
| #541 | TED Talk | Feb 9, 2009 |
| #540 | Base System | Feb 6, 2009 |
| #539 | Boyfriend | Feb 4, 2009 |
| #538 | Security | Feb 2, 2009 |
| #537 | Ducklings | Jan 30, 2009 |
| #536 | Space Elevators | Jan 28, 2009 |
| #535 | It Might Be Cool | Jan 26, 2009 |
| #534 | Genetic Algorithms | Jan 23, 2009 |
| #533 | Laptop Hell | Jan 21, 2009 |