Within the stream system, longitudinal connectivity refers to the pathways along the entire length of a stream. As the physical gradient changes from source to mouth, chemical systems and biological communities shift and change in response.
Cast. 1  Cuba Gooding Jr. as James Robert Radio Kennedy. 2  Ed Harris as Coach Harold Jones, the head football coach. 3  Debra Winger as Mrs. Linda Jones. 4  S. Epatha Merkerson as Maggie Kennedy, Radio's mother. 5  Sarah Drew as Mary Helen Jones. 6  Alfre Woodard as Principal Daniels. 7  Brent Sexton as Coach Honeycutt, the basketball coach.
Cast and Characters. Main castEdit. The original cast consisted of Anthony Edwards as Dr. Mark Greene, George Clooney as Dr. Doug Ross, Sherry Stringfield as Dr. Susan Lewis, Noah Wyle as John Carter, and Eriq La Salle as Dr. Peter Benton. Julianna Margulies guest starred in the pilot as Carol Hathaway before becoming part of the regular cast. The first additions to the cast came in Season Two with Jeannie Boulet (Gloria Ruben) and Kerry Weaver (Laura Innes) signing on. The cast remained largely unchanged until Season Five, when Kellie Martin joined the cast as medical student Lucy Knight and George Clooney became the first major departure.