- Duelling Shows: It was this with Taiyo Ni Hoero, while G-Men '82, the Sequel Series, was this to Seibu Keisatsu.
- Hilarious in Hindsight: Kinji Fukasaku directed a few episodes of the show, but one of early films for Toei was entitled Gang vs. G-Men, coincidentally also starring Tetsuro Tamba.
- Keep Circulating the Tapes: The Grand Finale was not rerun on Japanese TV for several years because it was produced by Teru Kondo Productions rather than Toei as with the rest of the series. It was however included in the G-Men '82 DVD release. Thankfully, the rights issues were cleared up a few years back and the episode was rerun on the Family Theatre channel.
- No Export for You: Subverted. A few episodes were aired stateside as part of the "Japan Night" block alongside Ultraman and several other Japanese shows, while in Hong Kong, where it was aired as "Dragon Squad Police Force."
- Real Life Writes the Plot: Daijiro Harada and Yosuke Natsuki, who played Inspector Sekiya and Superintendent Odagiri, both left the show because of disputes with Teru Kondo.
- Recycled Script: Some of the episode plots were reworked from Key Hunter.
- Retroactive Recognition:
- Keiko Tsugawa is played by Mari Natsuki, aka Big Mama. She also had roles inLegend of the Eight Samurai as the villainous Evil Queen Tamazusa and in Isle of Dogs.
- Go Wakayabashi appeared in Episode 18 of the Lone Wolf and Cub TV show as Asaemon the Decapitator, two years before G-Men.
- Takeshi Kaga, alias Chairman Kaga of Iron Chef was part of the show's last cast lineups from Episodes 307 to 355.
- Sequel Series:G-Men '82, which ran for 16 episodes in 1982.
- Spiritual Successor:
- To Teru Kondo's own Key Hunter, Eyeful, and Birdie.
- The show would get its own in the form of Super Police, with Tanba returning in the lead role.
- Tetsuya Kuroki was also the name of Tanba's character in Key Hunter, but is spelt differently in kanji.
- Kuroki's own getup was inspired by how Robert Stack dressed up as Eliott Ness in The Untouchables.
- The show got one, out of all things in this short video promoting democracy in Hong Kong at the 1:15 mark.
- Stephen Chow used the theme in the trailer for Journey to the West: Conquering the Demons.
- The Danza: Yasuaki Kurata as Detective Yasuaki Kusano.
- You Look Familiar: Go Wakayabashi had early guest roles in Episodes 4 and 80 before joining the main cast in Episode 105.
- You Might Remember Me from...:
- Kuroki, played by Tetsuro Tanba, is best remembered for his role as Tiger Tanaka in You Only Live Twice. Apparently his role in the film influenced how he was portrayed on Japanese TV for several years.
- Superintendent Noriyuki Odagiri is played by Yosuke Natsuki, whom Godzilla fans might remember in Ghidorah, the Three-Headed Monster and The Return of Godzilla.
- Yu Fujiki is also a face tokusatsu fans may remember, having had roles in King Kong vs. Godzilla, Mothra vs. Godzilla, and Ultraman Leo. He also had a starring role in G-Men's predecssor series Eyeful, and Birdie.
- Hiroshi Miyauchi joined the cast from Episodes 227 to 306.
Trivia / G-Men 75