Casey, April and others in “Unfinished Business”

Everyone can relax. Casey Jones is here. So what's up? Why'd I get 127 emergency texts? The pizza delivery guy disappear?

No. Splinter disappeared. He fell down that huge chasm in the Undercity.

Whoa. That's deep, yo.

I definitely lost my mental connection with Splinter. But that doesn't mean he's gone. We can't give up hope.

We're going back there! We'll find Sensei, no matter who gets in our way!