What Can Keep Mach Running?

What Can Keep Mach Running? (なにがマッハを走らせるのか) is the twenty-fourth episode of Kamen Rider Drive.

Synopsis
Kiriko continues to secretly harbor Chase while an impatient Go tries to rush the Mach Driver's repair.

Plot
Brain had just finished making adjustments to Shoot Roidmude's body, and ensured that the Roidmude would help him win Heart. Kiriko was asked by Chase if she was the one whom saved him, as she confirms. Chase felt guilt of her kindness, even after he had nearly killed her multiple times.

Exactly two days after his interrogation from the police officers, Takuro walked out from his school and met Shinnosuke again, as he noticed Takuro's change of behaviour compared to the last time they met. The boy becomes more serious and ordered Shinnosuke to get away from him. Rinna had just finished repairing the Mach Driver Honoh, but Go desperately wanted a new upgrade after his previous defeat from Shoot.

While on the sidewalk, Takuro received a message, stating that a bus stop near him would exploded at 1.13 pm and it exploded a minute later. Takuro ran away from the scene, only to bump into Shoot Roidmude. Shoot declared that his role in sending bomb threats is over, and now he's targeting him. Takuro tried to run away from him but he received a new message that the bicycle parking lot he stand in would explode in 1.44 pm. Fortunately, Shinnosuke saved him from the explosion. Mach arrived and battled Shoot but quickly incapacitated by his neurotoxins until Kiriko saved him with Mad Doctor.

At the Unit's office, Takuro revealed that it originally started as a prank. After going through his mundane life for days, he came across a bombing case. Shoot appeared to him while he's alone, and struck a deal for Takuro to send bomb threats and him bombed said locations. However, after his first destruction, he instead had decided to eliminate Takuro. Mr. Belt and Kiriko discovered that ever since Mashin Chaser upgraded himself, Drive would do the same to counter him but in the end, that makes Go leaving behind despite Mach's system supposedly made even more advanced than Drive System.

While Jun had cuffed himself to Takuro, Kyu just received a new bombing threat on Takuro's phone that stated to eliminate him. Shinnosuke went out, followed by Otta (whom stated to "evacuate nearby citizens") and Kyu (since he's "not" a police officer), leaving Jun trapped with Takuro. Kiriko comforted Go and reminded him that he is always confident ever since their childhood, as well as him becoming what remained for her after they were orphaned. With one minute left, Drive and Mach transform where Mach incapacitate his missiles at first before attacking Shoot. However, once fallen into his toxin's effect, Mach forced himself into the berserker state, saving him at the same time mastering the Dead Zone's side effects. Drive Type Formula joined the battle and they destroy Shoot with Trailer Impact and Heat Kick Macher

Takuro was freed once again, with Jun giving him several words of encouragement before he left. Go decided to call off his upgrade, having already strong on himself. Meanwhile, Chase left his hideout and decided to walk on his own while bringing along some of Kiriko's flowers.

Cast

 * Shinnosuke Tomari (泊 進ノ介): Ryoma Takeuchi (竹内 涼真)
 * Kiriko Shijima (詩島 霧子): Rio Uchida (内田 理央)
 * Chase (チェイス): Taiko Katono (上遠野 太洸)
 * Go Shijima (詩島 剛): Yuu Inaba (稲葉 友)
 * Jun Honganji (本願寺 純): Tsurutaro Kataoka (片岡 鶴太郎)
 * Rinna Sawagami (沢神 りんな): Rei Yoshii (吉井 怜)
 * Kyu Saijo (西城 究): Kenta Hamano (浜野 謙太)
 * Genpachiro Otta (追田 現八郎): Taira Imata (井俣 太良)
 * Narration (ナレーション), Drive Driver's voice (ドライブドライバーの声): Chris Peppler (クリス・ペプラー)
 * Brain (ブレン): Shota Matsushima (松島 庄汰)
 * Heart (ハート): Tomoya Warabino (蕨野 友也)
 * Medic (メディック): Fumika Baba (馬場ふみか)

Guest cast

 * Takuro Mogi (茂木 拓郎)/Shoot Roidmude: Naoki Takeshi (武子 直輝)
 * Kiriko Shijima (Child): Yui Kato (加藤 結)
 * Go Shijima (Child): Ryu Hashizume (橋爪 龍)
 * Students: Arima Kamei (亀井 有馬), Shutaro Yoshida (吉田 秀太朗)
 * Bomb Squad: Jiro Uchikawa (内川 仁朗), Kazuya Okada (岡田 和也), Shogo Teramoto (寺本 翔悟), Kei Tanaka (田中 慶)

Shift Cars & Signal Bikes

 * Car Used:
 * Type Change: Shift Formula
 * Tire Exchange: Mad Doctor (w/ Deadheat Mach), Sparner F03 (once in Trailer-Hou), Jacky F02, Mantarn F01 (in Trailer-Hou)
 * Type Used:
 * Type Formula, Type Formula Sparner, Type Formula Jacky
 * Bike Used:
 * Form Change: Shift Dead Heat
 * Signal Exchange: Kaksarn (w/ Deadheat Mach)
 * Form Used:
 * Deadheat Mach

Errors

 * to be added