|
| Year | # | Guest(s) | Theme |
| 1977 | 1 | Dr. James Gunn and Frederik Pohl | Humanism, the Humanities, and the Future |
| 1978 | 2 |
| Golden Anniversary celebration of Jack Williamson's career as an author |
| 1979 | 3 | Dr. June Goodfield and Dr. Jack Williamson | Playing God: the New Biology Moral Issues and Genetic Engineering: Fiction into Fact! |
| 1980 | 4 | Ben Abruzzo | The Future of Balloon Flights |
| 1981 | 5 | Dr. Vartan Gregorian | Past and Future |
| 1982 | 6 | Dr. John Newport | America's Continuing Controversy over Humanism |
| 1983 | 7 | Gordon Greaves and Robert Silverberg | If . . . or, The Janus View and The Future of Humanism |
| 1984 | 8 | Dr. Ihab Hassan | Imaginary Cities |
| 1985 | 9 | William Eamon | Albert Einstein and the Generation of 1905 |
| 1986 | 10 | Edward Bryant | Ad Astra per Covered Wagon: When our President was Jack Williamson's Future |
| 1987 | 11 | Dr. Thelma Shinn | Worlds within Women: Programs for Social Change in Women's SF and Fantasy |
| 1988 | 12 | Dr. Thomas Clareson | Latitude: Portales; Dimension: Williamson |
| 1989 | 13 | Harlan Ellison | The Great, Lost, Ancient Secret of Fame and Success as a writer, Part I |
| 1990 | 14 | Julius Kargarlitski | SF and Perestroika |
| 1991 | 15 | Stephen R. Donaldson | Epic Fantasy and the Modern World |
| 1992 | 16 | Joe Haldeman | The Three Cultures |
| 1993 | 17 | Dr. Jerry Pournelle | The Future of Democracy |
| 1994 | 18 | Frederik Pohl, Connie Willis, and Charles N. Brown | A Century of Science Fiction: 1926-2026 |
| 1995 | 19 | Suzy McKee Charnas, Roger Zelazny, George R. R. Martin, and Jane Lindskold | Humanities in the 21st Century |
| 1996 | 20 | C. J. Cherryh and Tim Powers | Worlds Enough and Time: Alternative Space in SF |
| 1997 | 21 | Melinda Snodgrass, Mike Resnick, and Michael Cassutt | Images of the Future in Science Fiction Film and Television |
| 1998 | 22 | Nancy Kress and Terry Bisson | Designer Genes and Brave New Worlds |
| 1999 | 23 | Connie Willis, Greg Bear, and Charles N. Brown | The Millennium Voyeur
|
| 2000 | 24 | James R. Frenkel, Joan D. Vinge and Joe Haldeman | Forevers, Unlimited |
| 2001 | 25 | Scott Edelman, Kristine Kathryn Rusch, and Dean Wesley Smith | New Science for a New Century |
| 2002 | 26 | George R. R. Martin and Michael Swanwick | Dragons, Dinosaurs, and Darwin |
| 2003 | 27 | Joe Haldeman and Connie Willis | Celebrating 75 |
| 2004 | 28 | Frederik Pohl and Robert Silverberg | Space Opera: Then and Now |
| 2005 | 29 | Walter Jon Williams and Gregory Benford | Posthumanity Evolving |
| 2006 | 30 | Kim Stanley Robinson and Frederik Pohl | Ecological Apocalypse |
| 2007 | 31 | Connie Willis, Richard A. Hauptmann, and Eleanor Wood | Metal Man to Stonehenge Gate: Seventy-Nine Years of Science Fiction |
| 2008 | 32 | Steven Gould and Alberto Rojo | Translocation/Transformation: Conjuring the Future |
| 2009 | 33 | Nalo Hopkinson and Gardner Dozois | New Moon Rising: Telling Science Fiction |
| 2010 | 34 | Ian Tregillis | Science Fantasy: Into the Next Decade |
| 2011 | 35 | Melinda Snodgrass and Michael Cassutt | Six Minutes into the Future: SF in Film and TV |
| 2012 | 36 | Daniel Abraham and Carrie Vaughn | Urban Fantasy |
| 2013 | 37 | Joe Haldeman | - |
| 2014 | 38 | Darynda Jones | The Wide World of Speculative Fiction |
| 2015 | 39 | Paolo Bacigalupi | Windup Worlds |
| 2016 | 40 | Victor Milán | The Many Faces of Victor Milán |
| 2017 | 41 | Melinda Snodgrass and Michael Cassutt | Reimagining the Super Hero: Celebrating 30 Years of Wild Cards |
| 2018 | 42 | S. M. Stirling | Changes |
| 2019 | 43 | Alex Rivera | - |
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