The day-long exhibition and gathering, being held at Preston Guild Hall, began in 2014 and continues to go from strength to strength.
The event featured a host of stalls, exhibits and guest appearances from stars of sci-fi films and comic books.
Former Dr Who Colin Baker was among the guests, as well as Hannah Spearitt from Primeval.
Others included Ross Mullan, who has played one of the sinister White Walkers throughout the Game of Thrones series, as well as numerous characters from Dr Who and Clash of the Titans.
Also attending was Tim Perkins, an award winning writer/artist who has been creating comics for over 30 years, which include work for Marvel, DC, Defiant, 2000AD and Tekno amongst many others.
Co-organiser Daz Wildman said organisers had also worked with Pokemon Go to arrange for Pokemon characters to be captured at the venue.
- See Tuesday’s LEP for a full roundup and spread from the event.