Best-known episode: "The Yada Yada"
We only meet Marcy for one episode, but she's immortal, unforgettable, yada yada yada. She likes to fast-forward through conversations with the phrase "yada yada," which can mean anything from bad egg salad to a shoplifting binge. But when she says, "My old boyfriend came over last night and yada yada yada, anyway, I'm really tired today," George wonders if she's yada yada-ing sex. She might be George's coolest girlfriend, but she's definitely the most succinct. Marcy is played by the great Suzanne Cryer — star of stage, screen, yada yada. ROB SHEFFIELD