| # | Date | Speaker | Subject | Place* |
| 15 | 2/2/05 | Mauro Pacelli | Quantum Computers | SWYC |
| 16 | 3/23/05 | David Groce | Benford’s Law | SIO |
| 17 | 4/27/05 | Bob Ginaven | The Three Gorges Dam in China | SWYC |
| 18 | 6/8/05 | Don Lyle, Jim Miller | The Pace of Technology Change in Computing | FSC |
| 19 | 7/20/05 | William Burns | Modeling Community Response and Impacts to a Terrorist Strike in a Large Urban Area | Cal State San Marcos |
| 20 | 9/14/05 | Barry Butler | Two Topics: 1) Peak Oil, and 2) Katrina | FSC |
| 21 | 11/2/05 | Raulf Polichar | New Gamma-Ray Detectors | FSC |
| 22 | 12/14/05 | Larry Kull | Dark Matter | SWYC |
