As a franchise, the Metal Hero Series constantly evolved and changed, with new ideas and concepts emerging with each series. This is a real-world documentation of the evolution and the milestones in the franchise, showing the changes, advancements and quirks which emerged with each new series since originally starting in 1982 lasting to 1999.
Uchuu Keiji Gavan
- First Metal Hero series.
- First Metal Hero/Space Sheriff (Space Sheriff Gavan).
- First show in the Space Sheriff Series.
Uchuu Keiji Sharivan
- Second show in the Space Sheriff Series.
Uchuu Keiji Shaider
- Third and last show in the Space Sheriff Series.
- Earliest show to have footage used in an American adaptation (VR Troopers season 2).
- First show to have a theatrical film (Uchuu Keiji Shaider (Film) and Pursuit! The Strange Kidnappers!).
- 100th Episode of the Metal Heroes Series: Suddenly! Lazy People.
Kyojuu Tokusou Juspion
- First standalone series/hero (Juspion).
- First non-Space Sheriff series/hero (Juspion).
- First non-clone evil counterpart of main hero.
Jikuu Senshi Spielban
- First Evil counterpart that starts off as and then switches back to good.
- First female and additional Metal Heroes (Diana Lady and Helen Lady).
- 200th Episode of the Metal Heroes Series: Shock, Gulp! The Beauty-Beauty's Robot.
Choujinki Metalder
- First android Metal Hero (Metalder).
- Shortest show in the series (39 episodes).
Sekai Ninja Sen Jiraiya
- First Metal Hero not fully covered by their suit (Toha Yamaji's original Jiraiya Suit, Princess Ninja Emiha).
- First suit upgrade (Jiraiya Power Protector).
- Last Showa era Metal Hero series (Emperor Hirohito passed away shortly before this series ended).
Kidou Keiji Jiban
- First cyborg Metal Hero (Jiban).
- First Heisei era Metal Hero series.
Tokkei Winspector
- First show in the Rescue Police Series.
- First Metal Hero team or "Metal Hero Sentai" (Winspector).
- First Rescue Police team (Winspector).
- First robotic additional heroes (Bikel and Walter).
- First robotic heroes with no human form (Bycle and Walter).
Tokkyuu Shirei Solbrain
- Second show in the Rescue Police Series.
Tokusou Exceedraft
- Third and last show in the Rescue Police Series.
Tokusou Robo Janperson
- First android robot Protagonist Metal Hero with no human form.
- First Metal Hero series with no human Metal Heroes or robots/cyborgs with human forms.
- First standalone Metal Hero series of the 1990s.
Blue SWAT
- Second and last standalone Metal Hero series of the 1990s.
Juukou B-Fighter
- First show in the B-Fighter Series.
- First team of B-Fighters (First Generation of B-Fighters).
- First Replacement Metal Hero.
B-Fighter Kabuto
- Second and last show in the B-Fighter Series.
B-Robo Kabutack
- First of the "kiddie" robo Metal Hero series.
Tetsuwan Tantei Robotack
- Second and last of the "kiddie" robo Metal Hero series.
- Last show in the Metal Hero Series.
