!!The Franchise
* HeyItsThatVoice: In "The New Adventures of Flash Gordon" (1979-1980) by Creator/{{Filmation}}, Flash Gordon himself was voiced by Robert Ridgely. Who is also known to fans for playing Franchise/{{Tarzan}}, WesternAnimation/ThundarrTheBarbarian, [[WesternAnimation/SpiderManAndHisAmazingFriends Kraven the Hunter]], [[Comicbook/IncredibleHulk General Thaddeus "Thunderbolt" Ross]], and [[WesternAnimation/{{Centurions}} Rex Charger]].
** Dale Arden was voiced by Diane Pershing. Who also played [[MightyMouse Pearl Pureheart]], [[WesternAnimation/{{Centurions}} Crystal Kane]], [[WesternAnimation/SheRaPrincessOfPower Netossa and Spinnerella]], and [[WesternAnimation/BatmanTheAnimatedSeries Poison Ivy/Pamela Isley]].
** Ming the Merciless was voiced by Alan Oppenheimer. Who also played MightyMouse, [[WesternAnimation/HeManAndTheMastersOfTheUniverse1983 Battle Cat/Cringer, Man-At-Arms/Duncan, Skeletor, Mer-Man]], [[WesternAnimation/TheTransformers Beachcomber, Seaspray, Warpath]], [[WesternAnimation/BionicSix Professor Amadeus Sharp]], [[WesternAnimation/TheSmurfs Vanity Smurf]], [[WesternAnimation/RubySpearsSuperman Jonathan Kent]], [[WesternAnimation/FantasticFour Uatu the Watcher, and Firelord]].
** Princess Aura was voiced by Melendy Britt. Who also played [[TheNewAdventuresOfBatman Batgirl/Barbara Gordon, Catwoman]], [[WesternAnimation/SheRaPrincessOfPower She-Ra/Princess Adora and Catra]].
* WhatCouldHaveBeen: GeorgeLucas tried to get the rights to ''Flash Gordon'' to make his own movie. When blocked by [=Dino DeLaurentiis=], Lucas decided to [[StartMyOwn make his own]] [[Franchise/StarWars space adventure series]].

!!The film
* AmericansHateTingle: The movie didn't do great in the US, but it was a mega hit in Great Britain. So much so that it's considered a classic there.
* BeamMeUpScotty: Ming never actually says "Pathetic earthlings, who will save you now?" Except in the {{trailer|sAlwaysLie}}.
** Ming does say "Pathetic earthlings", a '''lot'''. (ie. "Pathetic earthlings, hurling yourself out into the void...")
* DoingItForTheArt: Playing Vultan was Creator/BrianBlessed's lifelong dream.
* HeyItsThatGuy: Yes, it's an AllStarCast (including Creator/BrianBlessed), but Creator/DeepRoy is Aura's valet and [[Film/TheRockyHorrorPictureShow Riff-Raff]] is Barin's [[TheDragon dragon]] Fico.[[note]]"And Flash Gordon was there in silver underwear..."[[/note]]
** Also [[Franchise/StarWars Porkins]]!
** And [[Series/DoctorWho Light]] as one of Vultan's guys!
** [[Film/HarryPotter Kingsley Shacklebolt]] as Prince Thun, who can offer nothing this year but his loyalty.
* PromotedFanboy: Creator/BrianBlessed has admitted in interviews that when he and his brother used to play a game based on the TV series he always wanted to be Vultan. Decades later he got to play the same childhood game on the big screen.
* StillbornFranchise: The actors signed up for a trilogy of films a la ''Franchise/StarWars'', and there was a spinoff children's TV show.
* ThrowItIn: Flash jumping into the camera screaming "YEAH!" was an improvisation by Sam Jones, as nobody could figure out how to end the movie.
* VindicatedByCable
* WhatCouldHaveBeen: All actors were signed for three movies, but problems with star Sam J. Jones during post-production (which led to SameLanguageDub) pretty much killed the trilogy.
** The first draft of the script had, among other things, no Kala, Klytus being psychic, a Tiger Man aiding Flash, Ming having a group of Amazon warriors, and a proper swordfight between Flash and Ming.
** Directors considered for this film included Creator/FedericoFellini and [[Film/TheManWhoFellToEarth Nicholas Roeg]].
!!The 2007 series:
* HeyItsThatGuy:
** Flash used to be [[{{Smallville}} Whitney Fordman]] and a demon named [[{{Supernatural}} Brady]].
** Barin is another [[{{Andromeda}} Rhade]] relation.
** Vultan was [[Series/BattlestarGalacticaReimagined Lt. Kelly]] in a past life and also a [[Series/{{Supernatural}} cajun vampire]].