Lois: Go ahead. It's a name brand. [opens can] [Malcolm drinks] I'm not mad at you. I know you didn't do this. You're a good boy. But I want you to help me find out who did.
[cut to Lois talking to Reese, who has also been given a can of soda:]
Lois: This is serious. One of your brothers could have burned the house down. And for that, he will be severely punished. But the one who helps me will be a very happy boy.
[cut to Lois talking to Dewey, who has again been given a can of soda:]
Lois: And I want that to be you.
[montage of Lois talking to Malcolm, Reese and Dewey:]
Lois: 'Cause you've always been the best one.
Lois: You've always been the best one.
Lois: You have always been the best one.
[montage:]
Malcolm: Mom, honestly, I don't know who did it.
Reese: I don't know.
Dewey: Don't know.