Now you’ll just have to repeat the same process as before. Have Catwoman block switches, and shift them using Batman’s Remote Electrical Charge.
Then prepare to dodge the blades again. For the third round you will have to clear spaces for two lights instead of one, but it is no more challenging than the first round.
The only major difference is that the saws after the third round of lights never ends. You have to make your way back to the upper level.
The Riddler will be upset, but he is a man of his word (or so he says), so you can collect the final key and watch as relief washes over Catwoman’s face.
Head towards the exit of the orphanage to call it day. Oh wait, we should probably mention that when you try to exit a huge, electrified mech manned by none other than the Riddler himself is out to kill both you and Catwoman along with a small army of color-coded Riddler bots.