The hero of this series is a robot named "Robot Detective K" (or just "K"), who has no human form, but when not in battle, dresses up in human clothes and has a human-like personality
Along with Android KikaiderRobot Detective was one of the early predecessors to what would become the Metal Hero Series of programs featuring human-sized cyborg heroes.
Episode List
The Murderous Salesman of BAD (バドーの殺人セールスマン, Badō no Satsujin Sērusuman)
The Eye-Witness is a Zero (目撃者はゼロ, Mokugekisha wa Zero)
The Insanity Watch Scandal (時計発狂事件, Tokei Hakkyō Jiken)
The Murderer Disappears in the Wall (壁に消えた殺人者, Kabe ni Kieta Satsujinsha)
The Mystery of the Double Criminal (二重犯人の謎, Nijū Hannin no Nazo)
The Terrifying Execution Machine!! (恐怖の死刑マシン!!, Kyōfu no Shikei Mashin!!)
The Overheaded Terror!! (頭上の恐怖!!, Zujō no Kyōfu!!)
The Thunder Kills?! (雷が殺した?!, Kaminari ga Koroshita?!)
The Electric Chair Spy!! (電気椅子スパイ!!, Denkīsu Supai!!)
BAD's Massacre Strategy!! (バドーのみな殺し作戦!!, Badō no Minagoroshi Sakusen!!)
The Secret of BAD Base!! (バドー基地の秘密!!, Badō Kichi no Himitsu!!)
Aiming for the Mother! (マザーが狙われる!, Mazā ga Nerawareru!)
Watch out for the Devilish Smoke! (悪魔の煙に気をつけろ!, Akuma no En ni Ki o Tsukero!)
Lighting Eyes of Terror!! (光る眼の恐怖!!, Hikaru Manako no Kyōfu!!)
Target is Atom Number 79?! (標的は原子番号79?!, Hyōteki wa Genji Bangō Nanajū-Kyū?!)
Snatch Away from BAD!! (バドーから奪え!!, Badō kara Ubae!!)
The Demonic Suds in a Disappearance?! (魔の泡に消されるな?!, Ma no Awa ni Kesareru na?!)
BAD's Frozen Strategy!! (バドーの冷凍作戦!!, Badō no Reitō Sakusen!!)
Pursuiting the Mystery in the Seas of Okinawa!! (沖縄の海に謎を追え!!, Okinawa no Umi ni Nazo o Oe!!)
The Hydrogen Bomb Blimp Heads to Tokyo! (水爆飛行船 東京へ!, Suibaku Hikōsen Tōkyō e!)
The Terrifying Electrothermal Man: Mother Blows Up and Sinks!! (恐怖デンネツマン マザー爆沈!!, Kyōfu Dennetsuman Mazā Bakuchin!!)
The Terrifying Missile Man: BAD's True Colors!! (恐悪ミサイルマン バドーの正体!!, Kyōfu Misairu Man Badō no Shōtai!!)
Diving Man: Underwater of Terror (センスイマン 水中の恐怖!!, Sensuiman Suichū no Kyōfu)
A character resembling K appears in
Shin Kamen Rider and its manga spin-off There is no true peace in this world -Shin Kamen Rider SHOCKER SIDE-, voiced by
Tori Matsuzaka. This version of the character is depicted as an AI working for SHOCKER.