With Wolowitz in charge, Sheldon and the gang experiment on the kids on The Big Bang Theory. "The Conference Valuation" is the 17th episode of the show's 12th season.
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?