Five different points of view show the attack on the Green Zone.

Will, Katie, and Broussard battle the Red Hand for control of the RAP gauntlet; Snyder helps Helena regain control over the Los Angeles bloc.

Will and Katie must save a fugitive from the occupation; at the camp, Snyder hides evidence; Broussard’s cell is threatened by one of their own.

Will, Katie and Broussard search for a way out of the colony. Maddie gets some visitors in the Green Zone. Bram looks for closure.

While Pete and Myka travel to West Virginia to investigate a rust-like infection among steelworkers, Steven and Claudia go to Steven’s home to find a way to break the metronome’s…

Susan throws herself into her work to escape her stressful personal life, earning recognition from Kerry and Mark, who begins preliminary discussions on next year’s chief resident. Carter needs a…

Susan visits a psychiatrist to cope with the loss of Little Susie. Jeanie’s estranged husband Al checks in the ER complaining of flu-like symptoms, which turn out to be caused…

Carol is pushed to the breaking point after another day when politics triumph over health care, and she quits. Dr. Greene “trades his soul” when he agrees to back Weaver…

Mark is riddled with self doubt as the hospital prepares to settle the O’Brien suit. Kerry appoints herself as Susan’s personal mentor. Carol mind a bucketful of expensive worms. Doug…

The ER hosts roughly a dozen pregnant women when a sprinkler bursts in the maternity ward. Carter plays tour guide for the visiting surgical intern hopefuls before going through the…

Mark finds himself manning a very crowded ER on his scheduled night off, filling in while Doug is out with whiplash and Susan meets with her lawyer. He tries to…

Carter engages in competition with new surgical resident-in-training Dale Edson upon learning that residents will be evaluated and graded; only the top ones advancing to second year. It doesn’t help…

Weaver and Susan’s feud escalates to the point where Mark needs to step in and fix it. Benton is involved in a parking lot altercation, resulting in a broken hand…

Speculation runs through the ER, on a very hectic day, about Randi’s possible criminal history. Mark faces an ethical dilemma when he has to decide whether to report yet another…

Carol and Jeanie try to find a home for a schizophrenic architect. Carter signs Benton up for an interview with Vucelich for a prestigious study. Carter and Harper try to…

The ER staffers are in decidedly unfestive moods as Christmas arrives. Carol’s spirits are lifted by a Santa-like patient. Mark is outraged when Jenn decides to stay in Milwaukee over…

The ER treats victims of a gang shootout. Carter arrives late and unprepared for his new position. Mark learns all about being an attending, including senior staff’s habit of bad-mouthing…

Kerry Weaver manages to offend just about everyone in her first day as chief resident. Carol goes on a ride-along with paramedics Shep and Raul, sharing a ferris wheel ride…

Carter gets his first patient…and loses him. Susan’s feud with Kerry Weaver intensifies when Weaver demands all of Susan’s procedures be cleared with her. Chloe abandons Little Susie again for…

Carol is pushed to the breaking point after another day when politics triumph over health care, and she quits. Dr. Greene “trades his soul” when he agrees to back Weaver…

Mark finds himself manning a very crowded ER on his scheduled night off, filling in while Doug is out with whiplash and Susan meets with her lawyer. He tries to…

Carter engages in competition with new surgical resident-in-training Dale Edson upon learning that residents will be evaluated and graded; only the top ones advancing to second year. It doesn’t help…

Susan throws herself into her work to escape her stressful personal life, earning recognition from Kerry and Mark, who begins preliminary discussions on next year’s chief resident. Carter needs a…

Susan visits a psychiatrist to cope with the loss of Little Susie. Jeanie’s estranged husband Al checks in the ER complaining of flu-like symptoms, which turn out to be caused…

The ER staffers are in decidedly unfestive moods as Christmas arrives. Carol’s spirits are lifted by a Santa-like patient. Mark is outraged when Jenn decides to stay in Milwaukee over…

Mark is riddled with self doubt as the hospital prepares to settle the O’Brien suit. Kerry appoints herself as Susan’s personal mentor. Carol mind a bucketful of expensive worms. Doug…

The ER hosts roughly a dozen pregnant women when a sprinkler bursts in the maternity ward. Carter plays tour guide for the visiting surgical intern hopefuls before going through the…

Weaver and Susan’s feud escalates to the point where Mark needs to step in and fix it. Benton is involved in a parking lot altercation, resulting in a broken hand…

Speculation runs through the ER, on a very hectic day, about Randi’s possible criminal history. Mark faces an ethical dilemma when he has to decide whether to report yet another…

Carol and Jeanie try to find a home for a schizophrenic architect. Carter signs Benton up for an interview with Vucelich for a prestigious study. Carter and Harper try to…

Kerry Weaver manages to offend just about everyone in her first day as chief resident. Carol goes on a ride-along with paramedics Shep and Raul, sharing a ferris wheel ride…

Carter gets his first patient…and loses him. Susan’s feud with Kerry Weaver intensifies when Weaver demands all of Susan’s procedures be cleared with her. Chloe abandons Little Susie again for…

The ER treats victims of a gang shootout. Carter arrives late and unprepared for his new position. Mark learns all about being an attending, including senior staff’s habit of bad-mouthing…

On a romantic weekend getaway to “”reconnect”” with Graham, Patty reveals another side of her personality; Angela copes with a visit from Rayanne, who has good reason not to leave.

Bailey develops a crush on Kirsten; Julia strives to be popular; Claudia searches for the Salinger’s long lost grandfather.

The crew is invited to the wedding of the air traffic controller.

Lowell’s ex-wife arrives on Nantucket for a friend’s wedding. Brian faces the prospect of meeting Alex’s parents. Joe deals with the loss of a tree and Fay becomes overbearing as…

Lowell and Bunny make their separation final by signing the divorce papers only to start sleeping together again. Meanwhile, Antonio consoles a woman who’s cheating husband left his cellphone in…

Lowell is paranoid about his wife, Bunny, flirting with other men. When Brian offers to help by talking to Bunny, he gets more than he bargained for.