Noah Wyle

"ER" (Thursday, April 2, at 9 p.m. on NBC)

After 15 seasons, the two-hour series finale of "ER" is bound to be a three-hanky affair. Say goodbye to the staff of Chicago's County General for the last time. Noah Wyle returns, as do many series alumni, and Alexis Bledel and Ernest ... moreBorgine guest star (as a couple! No, only kidding). Let's just hope no helicopters fall from the sky and kill the entire staff in one fell swoop.