Warning: Do not read if you have yet to see the final episode of “ER.” After being yelled at by Dr. Weaver (Laura Innes), who declared, “You are not working in this hospital! Not tonight!,” Dr. Doug Ross (George Clooney) gave her a look, planted a nice kiss on the quivering lips of his girlfriend, Carol Hathaway (Julianna Margulies), and … left. Yup, he left. And he left alone. As of today, Dr. Ross has re-settled in the Pacific Northwest. Who would have guessed it?