That David Arquette is a very busy man. He's an executive producer on the show Dirt with wife Courtney Cox, he stars in the ABC Comedy In Case Of Emergency, he makes small talk with Brangelina at the Golden Globes and now he's about to direct an episode of the NBC drama Medium, which stars his big sister, Patricia Arquette. Patricia says she's exicted about David directing, but admits to being a little nervous: "I was always a bossy little girl and being David's older sister I've bossed him around quite a bit. Now that he'll be directing me it will be payback time," she said. David's directorial debut, a feature film called Tripper, will be released this Spring.