When Krang is seen inside the android, his control panel changes from having red buttons, to yellow buttons, to gray with no buttons.
When Raphael, Leonardo, and Michelangelo first start to feel the effects of Kraang's love-potion in the Turtle Van, Leonardo speaks with Michelangelo's voice, and Michelangelo speaks with Leonardo's voice.
During this dialogue exchange: "Torpedo approaching dead ahead!"/"Did you have to use the D word?", Donatello speaks with Leonardo's voice, and Leonardo speaks with Donatello's voice.