A new episode of The Simpsons, titled "Pay Pal," will air tonight on Fox. In "Pay Pal," Marge swears off befriending any more couples when Homer offends their charming new British neighbors. But when Lisa declares that she, too, doesn't need friends, Marge reconsiders. The voice cast includes Dan Castellaneta as Homer Simpson; Julie Kavner as Marge Simpson; Nancy Cartwright as Bart Simpson and Nelson; Yeardley Smith as Lisa Simpson; Harry Shearer as Skinner; Hank Azaria as Moe, Pamela Hayden as Milhouse and Jimbo; and Tress MacNeille as Dolph. Guest voices include Peter Sagal as himself, Carl Kasell as himself and John Oliver as Booth Wilkes-John The Simpsons, "Pay Pal," airs Sunday, May 11 at 8 PM ET on Fox.