Choushinsei Flashman/Trivia
- Hey, It's That Guy!: Ley Nefel is played by Sayoko Hagiwara, alias Dyna Pink. This phenomenon looks... contagious, as later on, Kihachirou Uemura, who played Dai/Green Flash, would go on to play a villain in Chikyuu Sentai Fiveman.
- Hey It's That Guy's Voice: Sir Cowler is played by Joji Nakata, aka Alucard, Baki, Giroro, among others. He also went on to play the lead villain in Choujuu Sentai Liveman, Great Professor Bias.
- La Deus is voiced by Unsho Ishizuka AKA Sergei Smirnov and Jet Black.
- Kihachiro Uemura/Green Flash, who would later voice Chaka (one of Vivi's aides in Alabasta) in One Piece.
- Ley Wanda was the first major villain role played by Takumi Hirose, who would go on to play other villains in later Sentai shows (Dr. Kemp, Tranza, and Jin Matoba).
- Kazuoki Takahashi (Sho Hayate in Dengeki Sentai Changeman) plays Miran, a young man who believes that Sara is his missing sister in Episode 21.
- Ryosuke Kaizu, who would go on to play Takeru/Red Mask in the following Sentai series Hikari Sentai Maskman, guest-stars in Episode 27 as aspiring boxer Ryu Wakakusa.
- Mina Asami, who would go on to play a double role in Hikari Sentai Maskman as Prince Igam and Princess Iyal, guest-stars in Episode 40 as Cybele, a renegade Mess researcher who helps out Jin.
- Koji Unoki, who was Yosuke Shima/Dyna Blue in Kagaku Sentai Dynaman, appears in Episode 5 as Officer Hiroshi Tachibana, a policeman who befriends Lou and Sara.
- Yoshinori Okamoto, who in this series played Cowler's assistant Bo Gardan, was in Dengeki Sentai Changeman (the previous series as Booba). He also returns in Choujuu Sentai Liveman (along with the actors of Cowler and Wanda) as Doctor Ashura.
- What Could Have Been: Titan the Hero was originally planned to be a semi-regular character who would show up once in a while to help out the Flashman team and pilot the Great Titan. Had this been the case, Flashman would've been the first Sentai series to feature an extra hero.