For the actual episode, after the failure of turning the entire planet into absolute darkness, the Underground Empire Tube resorted to this, to turn every tunnel in Japan into Mobius Tunnels just for the humans to see the might of the Underground Empire Tube! I find this plan too retarded for some group whose aim is to remove the light from the planet Earth. I mean, what's the point of having humans trapped inside the Mobius Tunnel as some of them are not passing tunnels! Even if the plan sounds great, there is one thing that beat it, Takeru's car but for what reason why Takeru's car escaped the Mobius Tunnel? We will get into that later.
Now for one of the highlights in this episode, The Maskmen's first actual transformation sequence! It's quite similar to how they transformed in the previous episode except this time around, it involves the Maskmen flying in midair, do their hand symbol and let the aura overflow in their bodies and pass a wall of aura giving them their suits. Aside that we see the Maskmen in their underwear, which disappoints me for a bit, is that I love the simplicity of the transformation sequence. It's nothing fancy, just the Maskmen getting their bodies covered with Aura Power.
Because the Sugata Super F1 Model is now used to fight Tube and not for the Grand Prix, it is renamed the Spin Cruiser and Takeru gave it a spin and destroyed Kabira Dogler's Mobius Tunnel that trapped Hisashi and his father! Now that the tunnel is destroyed, it's time for some more in-suit fight scenes since their plan was foiled by the Maskmen! This is when the Baraba makes his appearance outside their base. Baraba is one amazing warrior with amazing strength as his strength caused Blue Mask's feet and legs to be literally grounded!
After they beat the Kabira Dogler, obviously Okelampa turned it into a giant, the Maskmen used the Great Five to fight it, Kabira Dogler split themselves into two, and the two used their whips to bind the Great Five, robot escapes and finishes it. Since the Sugata Super F1 Model is now the Spin Cruiser, Takeru can't show it to the kid and instead promised him that they will build a better F1 model. The kid gives him his sketch book filled with F1 car designs and leaves with his father.