Splinter, Donnie and others in “Unfinished Business”

You were not fully prepared for what was up there. I trained you to fight as individuals, not as a team. And as your teacher, your father, the responsibility for that is mine. Perhaps in another year we can try again.

A another year!? Has everybody forgotten that people were kidnapped!? They don't have a year! Sensei, we have to do something now! You weren't there, Sensei. You didn’t see the way that girl looked into my eyes. She was scared and she's counting on me- I mean us- to save her.

Yes. You must save her.

I agree, Sensei, but in that fight we weren't actually a well-oiled machine.

Like that robot with the brain thingy.

Give it a rest.