Splinter and Donnie in “Unfinished Business”

This is all very grave news. Very grave, indeed.

I can't believe this is happening. Poor April. (We accidentally turn her dad into a bat and almost mutated her.)

Do not dwell on the past. (April will have to wait.) You must find every last canister of mutagen. You must search every street, every park and playground, every building and rooftop... before we have even more mutants on our hands.