A former janitor becomes a potential key witness, but Peter and Sam struggle to track him down. Meanwhile, they examine a student trip to Costa Rica.

An interview with a former St. Bernardine student gives the guys confidence that they’re on the right track with their most recent theory.

Who is the Turd Burglar, and why did they do it? Are Peter and Sam still chasing the truth, or has it been right under their nose the whole time?

Peter and Sam highlight Kevin McClain and his friendships as they start to break down the version of events supported by the school and police.

As Peter learns more about basketball star DeMarcus Tillman, he uncovers evidence of athletes getting preferential treatment at St. Bernardine.

Peter and Sam travel to a prestigious private high school in Bellevue, Washington, to document the story of a filthy vandal called the “Turd Burglar.”

An apocalyptic sandstorm engulfs Midnight concealing wraith-like demonic spirits heralding the arrival of a demon from Hell. Fiji knows this demon wants her and Bobo vows to protect her, while…

Quentin and Penny embark on a quest. Margo works on a way to help Eliot. Julia seeks an old friend’s help.

Benton tries to find out if everything’s OK with Carla’s baby. Carter tries to get a man operated, despite the fact Anspaugh thinks he will die no matter what.

Benton takes a day off to help Carla. Carter finds out Edson falsified a chart.

Anspaugh is furious when Carter tells him he wants to quit surgery. Charlie is brought in with an overdose. Mark keeps struggling with his beating.

Carol has to fire two of the nurses. Meanwhile, Gant feels Benton is too hard on him.

While on their helicopter flight rotation, Mark and Susan find an injured family of four who they bring to the ER.

Encouraged by Carol, Mark finally asks Susan out. Benton tries to save a boy, despite the fact Doug thinks he’s brain dead.

Chen’s patient refuses to reveal to his daughter that she might have inherited a terrible disease from him. Weaver defies Romano’s authority and performs a procedure that gets her suspended….

Carter and Lucy are discovered and the staff struggles to save them and go on with normal patient care.

Carter and Lucy scramble across Chicago to find a dying girl’s father who’s a perfect match for her very rare blood type. Benton operates without transfusions to save the little…

Lucy’s patient finally gets a heart transplant but does not survive. The transplanted heart will now go to another recipient. Greene interferes in a gay domestic situation. Corday tricked her…

Carter plays tour guide for Ruth Johnson, who was born in the hospital 100 years ago to the day, and her large family. Carol treats a boy who was hit…

Kovac and Haleh take care of Hathaway’s twins so the new mother can finally get some rest. The job transfer for Carla’s husband does not get approved allowing Reese to…

Dr. Corday commits a deadly error after being on-call for nearly 36 hours straight. Peter visits Dr. Kotlowitz and receives encouragement regarding a cochlear implant for Reese. Dr. Amanda Lee,…

After his mother’s funeral, Dr. Greene comforts his father in San Diego. In Chicago, Romano surprises Corday by appointing her associate chief of surgery. Corday treats Elaine, Carter’s lover, for…

When Anspaugh decides to retire as chief of staff and return to surgery, he appoints Romano as his replacement. Greene expresses reservations about the decision, but Weaver does not support…

Ross and Hathaway’s jobs are in jeopardy after their unauthorized treatment of a drug-addicted 7-month-old boy is discovered. Corday loses her sponsorship. Carter suspects Del Amico’s boyfriend when drugs are…

Carter finally works up enough nerve to ask Del Amico out. Jeanie tries to help Scotty decide whether to undergo an experimental treatment and Benton takes unexpected action during an…

Because of benzene that’s been spread, the ER has to close. Weaver gets felled and Carter has to take the lead.

Mark treats an old lady who has been brutally raped. Carter’s grandmother visits Carol’s clinic. After he’s touched by Benton, a blind man can see again!

An accidental overdose brings Drs. Green and Corday’s baby into the ER.

Greene confronts Corday when she orders Rachel out of their home; Abby tries to protect a battered neighbor who refuses to press charges against her husband.

A new medical student, Michael Gallant, arrives in the ER. He’s supposed to be working under Dr. Carter’s supervision but his grandmother is unwell. Elizabeth Corday is convinced that other…

Abby fears the worst when her brother Eric suddenly disappears. Carter and Chen treat a frightened Chinese immigrant nanny, Tong-Yi, whom they suspect was impregnated by her employer. Meanwhile, new…

Weaver returns to the emergency room after a self-imposed sabbatical of three weeks, wondering how her newfound lesbian identity will affect her workplace relationships. Having purposely allowed a mass murderer…

While examining a young boy, Pratt finds a suspicious gash across his chest and calls Wendall (recurring guest star MäDCHEN AMICK) for a consult. Kovac and Pratt examine a man…

On Thanksgiving Day, a helicopter crash outside the ER leaves several injured, and kills Dr. Romano. Alex tries to bring Sam and Luka together.

Jax and Clay keep SAMCRO focused on their impending showdown with Zobelle’s group; thanks to Gemma, Tara improves her job security at the hospital; Weston finally discovers his boss’s intentions…

The Grim Bastards have a problem that could jeopardize Samcro’s new business arrangements.

When SAMCRO pays a visit to another charter, not everyone’s happy to see the mother chapter.

The club embarks on a protection run, the likes of which they’ve never seen before.

Extreme measures are taken by SAMCRO to get a hold of weapons for a customer. A theft at Caracara Studios means revenge after one diva is put at risk. Tara’s…

While the club’s on a man hunt, Jax faces the toughest decision of his life.