Suzi and Don welcomed on Dr. Kate Darling, who is American but falls under the "third-culture" kid status. She grew up in Switzerland, but now is a researcher at the Massachusetts Institute of Technology (MIT) Media Lab, where she investigates social robotics and conducts experimental studies on human-robot interaction. In other words, stuff that is waaaaay over the simple-minded heads of Suzi and Don. They also talk how buying expats holiday gifts can cause confusion and Don gives his Christmas present to Suzi. (It involves chickens.)