Kamen Rider Drive Episode 12: Where Did The White Rider Come From?"
 

A new challenger approaches! Will he be friend or foe?!

...well that was flashy.

I didn't understand a word, but it was great. Mach is amazing. The preview was perplexing, and given the toy gimmicks I'm confused lol. Definitely need to see this subbed before I say it's excellent.. but all.. signals bend that way!

Cool and crazy episode again. Mach is kinda... err... flashy xD
Also, shirtless Heart. For whatever reason. o_O

I love how absurd this new jack is.
It is like they took Accel and Beast inside some fusion chamber and melded them into one.

so what's with drive vs mach fighting all about? seriously cant we have one show that there's no rider vs rider fighting accept for the really bad ones.

Birth didn't fight OOO until much later, and even then he was faking the betrayal. Plus I don't think Hibiki's guys fought each other.

And they added a bit of Gaim. For the backflips and stuff.

Hibiki.

http://kamenrider.wikia.com/wiki/Harley_Hendrickson

I hears that Mr. Belt or Rinna didn't invented Mach's stuff, it was a guy named Harley Hendrickson, He is an american scientist who invented Mach's belt and Signal Bike.

I interested in this american guy. Maybe he might appear at some later episodes I guess.