Teenage Mutant Ninja Turtles, Season 4

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

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

Casey:
Whoa. That's deep, yo.

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

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