High Quality Content by WIKIPEDIA articles! "Into the Crevasse" is the second episode of the fourth season of the American television comedy series 30 Rock, and the 60th overall episode of the series. The episode was written by co-showrunner and executive producer Robert Carlock and directed by Beth McCarthy-Miller. It originally aired on the National Broadcasting Company (NBC) network in the United States on October 22, 2009. Guest stars in "Into the Crevasse" include Will Arnett, Caitlin Fowler, Shawn Gianella, Jon Glaser, and Savanna Samson.