We're used to seeing Claire Danes shed a tear (OK, several) as Carrie Mathison on Homeland. But the three-time Emmy Award winner and mother of one is all smiles during her recent stint on Sesame Street. During her visit, Danes takes some time to teach Cookie Monster about diagrams. Even though her pupil presents her with some problems, like eating the prop, Danes manages to keep calm and carry on with the lesson. It must be a trait she picked up from the CIA.