Ellen has the exclusive farewell interview with the entire cast of "<b><i>The West Wing</i></b>," including MARTIN SHEEN, ALLISON JANNEY, BRADLEY WHITFORD, RICHARD SCHIFF, JIMMY SMITS, JANEL MOLONEY, KRISTIN CHENOWETH and DULE HILL. Ellen and the cast celebrate with a special season finale send-off party! The cast shares special moments and highlights from the past seven seasons.