Along with panels, seminars, and workshops with comic book professionals, one of the highlights of Comicon was the Saturday all-night film show.

Convention booklets produced in conjunction with each show featured original illustrations by comics professional and fanzine artists.

Early editions of the convention were intimate affairs where comics enthusiasts gathered to socialize, network, and educate each other about the form.

)[2] The first show attracted both professional and amateur creators of the time, including, Paul Neary, Jim Baikie, Steve Moore, and Nick Landau.

[3] Comicon '69, held in London, was organized by retailer Bram Stokes, "Godfather of British fandom"[3] Frank Dobson, and Steve Moore.

An underground comix panel featured cartoonist Edward Barker, and editors Mick Farren and Graham Keen.

[3] Attendees included comedian Bob Monkhouse and Monty Python member Terry Gilliam; Brian Bolland made his first professional contacts.

Comicon '73, planned and promoted by Bram Stokes and John Mansefield, was scheduled for the weekend of 21–22 July at London's Regent Centre Hotel, with special guests Frank Bellamy, Morris,[5] James Warren, Peter O'Donnell, Bruce Pennington, Jim Cawthorne, Yaroslav Horak, Eddie Jones, Philippe Druillet, Jean Giraud, and Albert Weinberg (Dan Cooper).

Films planned to be screened include a Star Trek blooper reel, Richard Corben's Neverwhere, an episode of The Avengers television show, and the U.F.O.

[7] The tenth anniversary show, Comicon '77, hosted the first presentation of the Eagle Awards, organized by Mike Conroy, Nick Landau, Fantasy Advertiser's Colin Campbell, Phil Clarke, and Richard Burton.

[14] In the end, the final incarnation of Comicon was held in late October 1981 at the old location of London's Regent Centre Hotel, organized by Dez Skinn and Frank Dobson.

[15] Skinn and Dobson organized the show as a more intimate convention, "with the fan in mind;" an art exhibit featured comics from Alex Raymond to the present.