DR. LEWIS FEARS FOR ARCHITECT WHO'S LOSING EYESIGHT; EMMY WINNER BOB NEWHART GUEST-STARS -- Dr. Lewis (Sherry Stringfield) fears for a distraught architect (Emmy Award-winning guest star Bob Newhart, "The Bob Newhart Show") whose degenerating eyesight makes him despondent while a spirited new nurse (new series regular Linda Cardellini) replaces Abby (Maura Tierney) -- who decides to return to medical school. Elsewhere: disaster strikes when the doctors suspect a mother (guest star Allison Elliot) is abusing her child; Dr. Corday (Alex Kingston) learns something shocking about the charismatic Dr. Dorset (guest star Bruno Campos, "Jesse"), and a green medical student (guest star Scott Grimes) is overwhelmed by the chaos and grisly conditions of life in the E.R. Laura Innes, Paul McCrane, Sharif Atkins, Mekhi Phifer and Parminder Nagra also star. TV-14