"Lee Marvin vs. Derek Jeter" is the seventeenth episode of the fourth season of the American television comedy series 30 Rock, and the 75th overall episode of the series. It was written by co-producer Kay Cannon and series creator Tina Fey. The episode was directed by series producer Don Scardino. It originally aired on the National Broadcasting Company (NBC) network in the United States on April 22, 2010. Guest stars in this episode include Elizabeth Banks, Will Ferrell, Steve Hely, Julianne Moore, and Ariel Shafir.