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The Advocate is the seventeenth episode of the ninth season of ER, and the one hundred ninety-sixth episode overall.
Starring: Noah Wyle (Dr. John Carter), Laura Innes (Dr. Kerry Weaver), Mekhi Phifer (Dr. Gregory Pratt) (credit only), Alex Kingston (Dr. Elizabeth Corday), Goran Visnjic (Dr. Luka Kovac), Maura Tierney (Nurse Abby Lockhart), Sherry Stringfield (Dr. Susan Lewis), Ming-Na (Dr. Jing-Mei Chen), Sharif Atkins (Dr. Michael Gallant)
Guest Starring: Josh Radnor (Keith Mitchell), Laura Cerón (Chuny Marquez), Troy Evans (Frank Martin), Yvette Freeman (Haleh Adams), Monté Russell (Zadro), David Dunard (), Marina Malota (Molly), Ely Pouget (Mrs. Banks), Esther Scott (), Michael B. Silver (Dr. Myers), Sam Vlahos (Pablo), Mel Winkler ()
Special Guest Stars: Bruce Weitz (Alderman John Bright)
with Frances Sternhagen (Millicent Carter)
Co-Starring: Rick Almada (Leprechaun), Perry Anzilotti (Perry), Michelle C. Bonilla (Harms), Deena Dill (Kristy), Mae Hi (Harriet), Lesley Leason (Valerie), Lucy Rodriguez (Bjerke), Tahmus Rounds (Colby), Bella Shaw (TV Anchor), Olga Vilner (Luda), Emily Wagner (Pickman)
Weaver finds her career at risk when she bends the rules to treat the alderman's romantic partner for syphillis who ends up suffering from an allergic reaction with tragic results; Kovac and Corday treat a rebellious teenage girl who ran away from a boot camp that her mother sent her to; Romano is replaced as the Chief of Staff by Weaver.