Tricon was the 24th Worldcon, held September 1–5, 1966, at the Sheraton-Cleveland. GoH: L. Sprague de Camp. Isaac Asimov was Toastmaster. Co-Chairmen: Ben Jason, Howard DeVore, and Lou Tabakow. Officially jointly hosted by Cleveland, Detroit, and Cincinnati (hence "Tricon") See Tricon Program for the complete convention program.
Among its events was a sneak peak at an upcoming TV show, Star Trek. Based on its scanty mention in con reports, the screening didn’t have a big impact on attendees, but it didn’t occur till 7 p.m. on Monday.
- Tricon publications on fanac.org
- Fred Pohl's Tricon Reminiscence
- Cory Seidman Panshin's Tricon Reminiscence
- Pat & Dick Lupoff's con report in Horrib 4
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