A new The Simpsons episode, "Luca$," airs tonight on Fox. In "Luca$," Marge is concerned that Lisa is dating below her station when she brings home competitive eater-in-training Lucas Bortner (guest voice Zach Galifianakis), and she enlists Homer to help Lisa explore other options. Meanwhile, Bart is thrilled to receive free gifts from Snake Jailbird after he helps the convict escape from a jam, but when a betrayal from Milhouse puts Snake back in jail, Bart must forge a plan to set him free. 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; Tress MacNeille as Dolph Guest starring Zach Galifianakis. The Simpsons, "Luca$," airs Sunday, April 6 at 8:00 pm ET on Fox.