CBS is fully committed to seeing their series success and is switching time slots for Mom and The Millers because of it so Mom can benefit from The Big Bang Theory lead in.
Sheldon: I'll have a diet Coke. Penny: Can you please order a cocktail? I need to practice mixing drinks. Sheldon: Fine... I'll have a virgin Cuba Libre. Penny: That's... rum and Coke without the rum. Sheldon: Yes, and would you make it diet?