[Switchblade]

It's weird, I actually watched a pretty similar episode of Metalder recently. Spoilers for this episode and Metalder follow:

Both are about the bad guys using a kid as the weapon to kill the hero, although in Metalder it's a little girl that's actually a robot with a bomb inside of her. I think Metalder pulled that part off more effectively, to be honest - mostly because the little girl was a full character and not a mostly mute infant. Plus she didn't know she was a bomb, or even a robot for that matter, which made it feel more heartrending to me when she blew herself up so she couldn't kill Ryusei.

Still, I think Skyrider had the stronger ending, mostly because it runs with the tragedy right up to the end, while Metalder wussed out and had the little girl rebuilt and sent to live with another friendly robot. Still, they were both really strong and moving episodes and I can't see any modern tokusatsu try something like this again (well, besides Garo). I definitely don't expect to see an episode of Fourze that does anything even half as dark as this.