I was looking around for some possible spoilers and I came across this. Check it out, see for yourself, it seems really interesting to me.
Info From Entertainment Tonight: #7 [-]
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(11/06/08 05:13 PM)
Reply Quote MoreMy Recent Posts Message Me Connection Blocking Invite Ignore User's Posts George Clooney Called Back to the ER? Nov. 6, 2008, 11:22 AM EST Entertainment Tonight
There's talk again of George Clooney and other former cast members returning to "ER" as the show gears up for its final season on NBC.
Clooney will return to the popular medical drama along with Noah Wyle and Eriq La Salle, Wyle tells TV Guide senior editor Will Keck.
"From what I heard, George said, 'absolutely,' schedule permitting," Wyle says of Clooney's reported return. As for La Salle, he will direct an "ER" episode this month, and then reunite with Wyle on screen as Dr. Peter Benton for a storyline shooting this winter to air next spring, TV Guide reports.
Wyle reveals more of the storyline: "As a result of [Carter's] once near-fatal stabbing [the same incident that killed off Kellie Martin's Dr. Lucy Knight in 2000], which led to my subsequent drug addiction, I come back from Africa requiring additional medical treatment for my one remaining kidney. I'm embarrassed to get treatment at County General, so I go up to North Western to get my dialysis up there, and that's where Dr. Benton spies my name on a patient list and comes to pay me a visit."