|This article is about a/an episode in Himitsu Sentai Gorenger.|
A Crimson Kick! Smash the Great Microbe Plan (紅のキック! 砕けミクロ大作戦 Kurenai no Kikku! Kudake Mikuro Dai Sakusen) is the fourth episode of Himitsu Sentai Goranger.
Following the lead of a dying scientist, Peggy researches a lab creating a deadly mold for the Black Cross Army.
At the Muto Bacteria Research Institute, Jade Mask describes Tsuyoshi to a duo of Black Cross scientists and how he is the most dangerous of the Gorangers. He then describes Akira, Daita, Peggy and Kenji using pictures in a projector and tells the scientists that in order for their plan to be a success, they will have to watch out for the five. Jade Mask hears a sound and sends a Zolder outside to investigate. The Zolder discovers two scientists escaping, and the scientists are cornered by a pair of Zolders and two scientists with pistols. The escapees get away, but one is shot and killed, while the other escapes, wounded, and hides in a trench. Jade Mask advises his henchmen to avoid following him, stating that he will eventually die of his wounds.
Peggy, out shopping, encounters the injured scientist, who tells her that he was attacked by Jade Mask, while Peggy tells Tsuyoshi over her communicator. At the hospital, Peggy discovers a mold growing on the dead scientist's face, which she tells Tsuyoshi about. Peggy then disguises herself as a reporter and goes to a local laboratory, claiming to be from Ladies Journal. A scientist analyses the mold and recognises it as one that grows on oranges, stating that it did nothing to the victim and that he will keep it and analyse it further. Peggy hears a call for help, which the scientist claims to be the hill myna. After leaving the lab, Peggy devises plans to break back in. The scientists in the lab talk to one another about how they have finally perfected the Jade Mold, revealing themselves to be members of the Black Cross Army. Outside, Peggy discovers blood on a wall and sneaks back, only to be ambushed by a pair of Zolders. She then morphs and takes out the Zolders before heading to the back and finding the storm cellar, within which she finds the real Dr Muto, owner of the lab, revealed as the same Muto Bacteria Research Institute Jade Mask was in earlier. Peggy is then ambushed by a scientist and thrown into the storm cellar with the other hostages, with her communicator breaking in the process. The Dr Muto imposter then reveals himself to be Jade Mask, and Dr Muto reveals Jade Mask's intent on testing the Jade Mold on them.
Back at Goranger HQ, Commander Kenpachi reveals the Jade Mold changes the cell structure of human skin. Daita and Kenji go to the Muto Bacteria Research Institute, where a old man, later revealed to be a disguised Zolder, tells them that the lab is closed. Daita asks about a young woman showing up to ask questions, and the Zolder tells them she went to another lab. A scientist in the building discovers that the reporter for earlier was Peggy in disguise and tells the Zolder to go check on the dungeon. In the dungeon, Peggy blows apart the bars using a explosive necklace and Jade Mask confronts her, revealing that they intend to complete their plan in 30 minutes. Jade Mask kills one of the scientists when he tries to stop him and Peggy is thrown back in the cell by a Zolder. Dr Muto then deduces that Jade Mask is intending to use a hot air balloon to scatter Jade Mold seeds through the air and kill off humanity.
Back at Snack Gon, Yoko and Tomoko tells Kenpachi that Dr. Muto is supposed to be in Europe, but they saw him (actually Jade Mask disguised as Dr. Muto) taking a walk in his garden that morning. Daita and Kenji realise that they were tricked and after Daita finishes his curry, they rush off with Akira close behind. At the Muto Bacteria Research Institute, Jade Mask orders the balloon to take off and makes Zolders force the hostages to watch. However, Peggy overpowers the Zolders and she and the scientists are rescued by Kiranger and Midoranger. Peggy morphs and reveals that they must take down the balloon. However, when Midoranger attempts to hit the balloon with his Midorang, Akaranger appears and tells him that if he hits the balloon, the Jade Mold will be scattered everywhere. Jade Mask shows up on a rooftop and mocks them, saying that they cannot stop the balloon. However, as the balloon flies over Japan, Aoranger appears in the Variblune and jets out with his Birdies, landing in the carrier, where he defeats the Zolders, disables the Jade Mold box and gives a mocking signal to Jade Mask: "Too bad your plan failed!".
Aoranger then exits the balloon and lands near Jade Mask and his Zolders, with the other Gorangers close behind. Jade Mask sends his Zolders at the team, who pose before fighting the Zolders. As Jade Mask attempts to escape, Momoranger chases after him. Jade Mask gets into a balloon to flee, but the Gorangers pull out the Goranger Storm, blowing up the balloon and killing Jade Mask. Back at the Black Cross Castle, the Black Cross Fuhrer curses the Gorangers for getting in the way of his plans again before Poison Gas Mask promises to finish off the Gorangers.
- Tsuyoshi Kaijo (海城 剛 Kaijō Tsuyoshi): Naoya Makoto (誠 直也 Makoto Naoya)
- Akira Shinmei (新命 明 Shinmei Akira): Hiroshi Miyauchi (宮内 洋 Miyauchi Hiroshi)
- Daita Ooiwa (大岩 大太 Ōiwa Daita): Baku Hatakeyama (畠山 麦 Hatakeyama Baku)
- Peggy Matsuyama (ペギー 松山 Pegī Matsuyama): Lisa Komaki (小牧りさ Komaki Risa)
- Kenji Asuka (明日香 健二 Asuka Kenji): Yukio Itō (伊藤幸雄 Itō Yukio)
- Commander Kenpachi Edogawa (江戸川 権八 Edogawa Gonpachi, Voice): Toshio Takahara (高原駿雄 Takahara Toshio)
- Yoko Kato (加藤 陽子 Katō Yōko)/Zero Zero Seven: Eri Kanuma (鹿沼絵里 Kanuma Eri)
- Tomoko Hayashi (林 友子 Hayashi Tomoko)/Zero Zero Eight: Megumi Shiragawa (白川恵美 Shiragawa Megumi)
- Haruko Nakamura (中村 春子 Nakamura Haruko)/Zero Zero Nine: Miki Honda (本田みき Honda Miki)
- Taro Kato (加藤太郎 Tarō Katō): Hiroyuki Konuma (小沼宏之 Konuma Hiroyuki)
- Black Cross Führer (黒十字総統 Kuro Jūji Sōtō, Voice): Mitsuo Andō (安藤三男 Andō Mitsuo)
- Narrator - Nobuo Tanaka (田中 信夫 Tanaka Nobuo)
- Jade Mask (翡翠仮面 Hisui Kamen, Voice): Kaoru Shinoda (篠田薫 Shinoda Kaoru)
- Poison Gas Mask (毒ガス仮面 Doku Gasu Kamen, Voice): Eiji Maruyama (丸山 詠二 Maruyama Eiji)
- Dr. Muto (武藤 Mutō): Yoshiro Kitahara (北原 義郎 Kitahara Yoshirō)
- Subordinate: Yasuhiko Uchida (打田 康比古 Uchida Yasuhiko), Yukihide Yuki (祐樹 幸秀 Yūki Yukihide)
- Scientists: Koji Koike (小池 幸二 Koike Kōji), Masaru Sakairi (坂入 正 Sakairi Masaru), Shuhei Takagi (高木 修平 Takagi Shūhei), Masaru Nogami (野上 正 Nogami Masaru), Fujito Uchimura (内村 不二人 Uchimura Fujito)
- Akarenger - Kazuo Niibori (新堀 和男 Niibori Kazuo)
- Aorenger - Hiroo Kawarazaki (河原崎 洋夫 Kawarazaki Hiroo)
- Kirenger - Naotaka Maeda (前田 直高 Maeda Naotaka)
- Momorenger - Midori Naito (内藤 みどり Naitō Midori)
- Midorenger - Bunya Nakamura (中村 文弥 Nakamura Bunya)
- This episode aired on NET the same day episode 4 of Kamen Rider Stronger, The Demonic Motorbike Reckless Driving Operation!, aired on TBS.
Himitsu Sentai Gorenger Volume 1 features episodes 1-6: Ep. 1: The Crimson Sun! The Invincible Gorengers, Ep. 2: The Blue Earth! The Deadly Desertfication Plan, Ep. 3: Big Counterattack! A Yellow Whirlwind, Ep. 4: A Crimson Kick! Smash the Great Microbe Plan, Ep. 5: Green Anger, Immortal Gas-Person, and Ep. 6: Red Riddle! Chase the Spy Route to the Sea. 
Blu-ray Box 1 comes with 16 episodes.