| June 2010 | Micki and Steve McDanal | Rocky Mountain Pyrotechnics Guild |
| May 2010 | Membership Renewal Party |
| Mar 2010 | Brian Maue | Teaching at Afghanistan’s National Military Academy |
| Feb 2010 | JJ Swiontek | How To Get Involved In Politics And Why |
| Jan 2010 | Victor Trucker | Let’s Get Metaphysical
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| Oct 2009 | Peter J. Wacks | M to A to Z; How to Tell a Nonlinear Story |
| Sep 2009 | Daniel F. Lynch, J.D. | Church, State and Constitution |
| Aug 2009 | Bob Ewegen | New Media and Old Problems |
| Jul 2009 | Luise and Jim Gunderson | Consciousness in Autonomous Robots |
| Jun 2009 | J. D. MacFarlane | Financial Buccaneers and Regulatory Failure |
| May 2009 | Bennie Bubb, M.D. | Explosion in Neurosciences |
| Apr 2009 | Allen Ernst | Reincarnation |
| Mar 2009 | Sheila Porter, Ph.D. | Picasso: Mad or Bad? |
| Feb 2009 | Richard Kerr | Historical Geography of the English Language |
| Jan 2009 | Joe Stone | Transhumanism |
| Dec 2008 | Tony Ruckel, Esq. | Past President of Sierra Club |
| Nov 2008 | Prof. Erica Ellingson | Dark Matter, Dark Energy and the Accelerating Universe |
| Oct 2008 | Fredrick R. Abrams, M.D. | Pulling the Plug: Medical Ethics at End of Life |
| Sep 2008 | Nick Samoylov | The Mad Russian Scientist Speaks Out |
| Aug 2008 | Neil Slade | Infinite Potential of the Human Brain |
| Jul 2008 | Thomas Daniel Nehrer | The Essence of Reality |
| Jun 2008 | Prof. Ved Nanda | Darfur: The Reponsibility to Protect |
| May 2008 | Jim Kneser | How Much Is that Kidney in the Window? |
| Apr 2008 | Tom Keller | Nikola Tesla, Forgotten Genius |
| Mar 2008 | Mitch Morrissey, Denver DA | DNA - from Crime Scene to Courtoom |
| Feb 2008 | Dave Kopel | The Second Amendment and the Supreme Court |
| Jan 2008 | Prof. George Potts | Memory and Perception |
| Nov 2007 | Kim Long | "The American Forecaster" |
| Oct 2007 | Tom Frey | Futurist, DaVinci Institute |
| Sep 2007 | Rev. Jack Van Ens | Portraying Thomas Jefferson |
| Aug 2007 | Prof. Tom Chase | Climate Consensus? |
| Jul 2007 | Kelly Dawson, MD | A Year in an Iraqi Prison |
| Jun 2007 | Earl Staelin | Big Bang - Fact or Fiction? |
| May 2007 | Dr. Jon Ormes | An Astrophysicist's Perspective of Next 1000 Years |
| Apr 2007 | Judge Larry Bohning | Why Do Drug Dealers Still Live with Their Mom? |
| Mar 2007 | Dr. Loren Cobb | National Strategic Simulations |
| Feb 2007 | Ken Gordon | Colorado Senate Majority Leader |
| Jan 2007 | Mike Keefe | Denver Post Editorial Cartoonist |
| Nov 2006 | Ed Schreiber | Why Music Feels Good - A Scientist's View |
| Sep 2006 | Rubi Nicholas | America's Funniest Mom |