The producers and cast of ER celebrate its 300th episode. This Paley Center for Media evening honors medical drama series ER as it celebrates its 300th episode. Becky Levikow (associate director of development, The Paley Center for Media, Los Angeles) welcomes the audience and introduces Stuart Levine (managing editor, Daily Variety), who moderates the following panelists: executive producer/writer/director John Wells; executive producer/director Christopher Chulack; executive producer/show runner David Zabel; as well as cast members John Stamos (Dr. Tony Gates), Maura Tierney (Nurse Abby Lockhart), Scott Grimes (Dr. Archie Morris), Parminder Nagra (Dr. Neela Rasgotra), Mekhi Phifer (Dr. Gregory Pratt), and Linda Cardellini (Nurse Samantha Taggart).