Dr. Anspaugh questions the staff that treated Rick Kendrick.  He asks both Abby and Susan about what they had seen and they answer him, covering as much as they can for Luka.  Luka gets tired of the way Abby and Susan are trying to take up for him and he begins to tell them all what happened.  He tells them that he only had two hours of sleep and was hung over.  He ignored Abby when she told him about the patient and he should have listened to her.  He admits to the crowd that he killed the patient.  Abby replies that the patient is not dead.  Luka walks out and Romano makes a statement.  He wants to know if anyone ever verified that there are really medical schools in Croatia?  Susan and Luka go to the lounge.  He thanks her for sticking up for him and she tells him that he needs to go back to work.  Luka isn't sure if he still works there and Susan tells him that Weaver has already asked for him.

The paramedics bring in a twenty-eight-year-old man named Chip Mealy, who has not had any sleep in three days.  He also complains of obsessive thoughts.  Susan tends to him and learns that he took five over-the-counter sleeping pills.  She asks him if he was trying to hurt himself and he tells her that he was just trying to get some sleep.  She then learns that he has been having problems with his girlfriend.  She tells him that he needs to talk with a psychiatrist and then she can give him something to help him sleep.  Susan asks Chuny to call psych.

Pratt is on his way in to work and he triggers the metal detector and the alarm goes off.  The officer, not knowing or caring who he is, pulls him aside.  Pratt tells him that it is just his cell phone and that he is a doctor there.  The officer wants to check his bag.  Carter sees the scuffle and comes over to see what is going on.  The security guard finds a gun and Pratt begins to explain.  He tells them that he found it outside on his way in.  It was behind the dumpster and he was afraid that whoever left it went inside and would come back out after it.  Pratt wanted to give the gun to a real police.  The security guard tells him that he is going to have to call the Chicago P.D. to come.  There is a patient being brought in and Pratt runs to assist.  The guard doesn't want him to leave, but Carter tells him that Pratt is a doctor there and he isn't going anywhere.  A woman has brought in a worker named Jose, that has fallen from a tree to the top of her house.  She tells them that she has hired them to cut down the tree and that he fell about twenty feet.  He is with his nephew, another Hispanic man, who was not injured as seriously.  Carter and Pratt have a hard time asking what is wrong, because they both only speak Spanish.

An elderly man is brought in by the paramedics.  His name is Mr. Gilman and he is complaining of chest pain and shortness of breath while having sex with his wife.  Kerry is a little shocked when she finds out that he is ninety-three.  Kerry asks Luka to give her a hand and he helps get the man off of the gurney.  They man is asking about KoKo, his wife.  Gallant is also assisting her.  Chuny comes in and hands Gallant a note.  Kerry asks what they are doing passing notes and he tells her that the note is from Harkins and that she is getting out of the hospital today.  He tells them that he has been helping her with her reading assignments while she has been out.  Luka seems uncomfortable about the discussion and is ready to leave the room.  Kerry asks him to go upstairs to ICU and check a post-intubation film for her and he gladly leaves.

Pratt, Carter and Abby are working on their injured patient as the woman and his nephew are watching on.  He has several broken bones and has a lot of abrasions.  The woman sees that he is in bad shape and needs to call her husband.  Jerry comes in with the security guard and a cop.  They are insisting on speaking with Pratt he tells them.  Carter tells Jerry to get them out and that Pratt is busy with their patient.  The police tells Pratt that Officer Robbins as told him what happened and Carter insist that they leave the room and wait.  He tells Jerry to take them out and bring back someone who can speak better Spanish than they can.  As they leave, Pratt tells Carter, "It's not what you think."

Susan finds her patient Chip crying.  He just wants to sleep he tells her.  Susan tells him that she will get somebody down to speak with him soon.  A girl comes up to Susan and is speaking very fast about how Susan's face is shaped like a square.  She continues on until Jing-Mei comes to get her.  She explains that she is a "Mathlete" and was brought in after acting hyper.  Jing-Mei tells Susan that she is on a math team and Susan tells her that they use to call kids like that geeks.

Weaver walks in on Gallant shocking Mr. Gilman.  Gallant is able to get his heart rhythm back.  Kerry asks if his wife has been located yet and is wondering how she survived the sexual encounter.  Haleh tells Weaver that she must have brushed up against some blood, she has some on her lab coat.  Kerry excuses herself and leaves the room as she orders some test for Gallant to run on Mr. Gilman.

Pratt is suturing one of the workers that were injured.  Chuny is helping him translate and interpret to see what had happened to his uncle, Jose.  Chuny tells Pratt that they are in the US illegally.  Pratt tells Chuny to tell him that they can have their care free of charge.

Susan calls up to Psych. again.  They quickly put her on hold.  Chen's patient, Anastasia, comes up to the board where Jerry is standing, and begins to erase all of the patient's names.  Dr. Chen catches up with her and confronts her about taking Ritalin to help her stay up to study for the math competition.  She tells her to put the names back on the board, and she proceeds to do it from memory to Jerry's amazement.  The officers come to speak with Pratt about the gun.  Susan gets disconnected from Psych. and notices that her patient, Chip, is missing.

Kerry has gone into an empty exam room to do a sonogram on herself.  Abby comes in looking for the Sonosight.  She sees that Kerry is concerned and she helps her.  Kerry tells her that she can't find her baby's heartbeat.  Abby asks her how far along she is and Kerry tells her fourteen weeks.  She asks her if she has been bleeding and Kerry tells her a little.  She thought that she was just spotting.  Abby tells her that she is sorry.  Abby wants to know if she can call her OB?  Kerry tells her that she prefers that it happen naturally.  Abby tells her that she should go home, but Weaver just asks her to bring her some scrubs when she gets a chance.  Abby leaves her alone in the room.

Daniel Gilman's wife, KoKo, has arrived and has all the men at the front desk staring.  She is a lot younger than they had been expecting.  Gallant takes her to her husband and Abby calls all of the men pathetic.  Dr. Kayson and Gallant explain to her about her husband's serious heart condition.  Mr. Gilman whispers to Gallant, "When can I bang her"?  Dr. Kayson is curious as to what the old man asked and Gallant embarrassingly explains.   KoKo tells the men that she and her husband are trying to have a baby.  Dr. Kayson tells him that  when he can walk up two flights of stairs without getting winded, then he can start having sex with his wife again.

Dr. Chen is trying to treat an older gentleman who prefers seeing a male doctor.  His name is Jim McNulty and he has a woman with him.  He sees a man doctor walk by and tells Dr. Chen that he would rather be seen by Junior, who happens to be Dr. Carter.  They learn from the lady that is with him that Mr. McNulty is a doctor and was attacked at his clinic by a baseball bat.  He was struck over the head and he fell down on some broken glass and hurt is leg.  Carter tells him that he needs a head CT, since he lost consciousness.  Carter sees Abby and tells her what tests need to be run on him.  Abby is with a young man that has to pee in a cup.  Abby asks Dr. McNulty when the last time was that he had a tetanus shot and he replies, "October....1949".  The boy asks her if the man will have to pee in a cup too and she tells him yes.

Carter finds Pratt and asks why he dispo'd the tree trimmer without asking him first?  Pratt tries to explain everything to Carter, but Carter is still upset about the whole gun issue.  Abby takes the little boy to the bathroom.  She tells him that she will wait right outside.  Abby sees a man go into the restroom right behind him, but doesn't think anything about it.  Susan walks by and asks her if she has seen her patient Chip?  Abby tells her yes, he just went into the restroom.  Susan is relieved that she saw him.  She asks Abby what she is standing there for?  Abby tells her that she just sent a young boy in there for a urine specimen.  Susan runs into the restroom and Abby follows in behind her.  Susan bangs on the stall and the boy comes out.  They send him out into the hall.  They find Chip a few stalls down.  He is huddled up into the fetal position with the word EVIL scratched out into his forehead.

Weaver sutures Rosemary's head.  She tells her that she has a bladder infection and that it has spread to her kidney's.  She passed out because of the fever and infection and that is how she hit her head.  Weaver asks her if she is sexually active and Rosemary tells her yes and that she only has one partner.  She was afraid to let her parents know, because she doesn't want them knowing that she is having sex.  Kerry tells her that they don't need to know, but they do need to know that she is sick. Kerry is cramping and has to leave the room.  Gallant sees her and wants to ask her something, but she tells him that he will need to find Dr. Carter and she walks away.  Gallant turns to see Koko on top of Mr. Gilman.  He runs in and tells her to get off of him.  Mr. Gilman doesn't want her to go and yells for his Viagra.  Out in the hall, Mr. Gilman's adult son and daughter show up.  The daughter has Power of Attorney and wants the slut out of there.  The son comforts KoKo.   

Susan and Abby speak with Dr. DeRaad about Chip.  He tells them that until Chip states that he is going to do something wrong, he cannot hold him.  He cannot hold him for thoughts about doing something.  Susan tells him that she will get him to say it.

The Math team coach shows up and takes the students.  Chen learns that they have a five hour drive ahead of them and they should be calmed down by then.  Pratt calls Chen a hot nerd.  Jerry tells Pratt that he has a phone call.  Pratt answers the phone and then tells Chen that he has to leave and for her to cover for him.  This isn't the first time she has had to cover and she is upset.   

Abby finds Kerry sitting down in the drug lockup.  Kerry is cramping and bleeding and has already filled four pads.  Abby asks her how long and Kerry tells her for about an hour.  Abby asks her if she wants her to call Sandy and Kerry tells her no, that she is at work.  Abby tells her that she is going to call Maynard, Kerry's OB, on her way out.

Carter walks up and sees Dr. McNulty suturing himself.  He tells Carter that he has been waiting too long.  Carter tells him that he cannot do that.  Gallant pulls Carter away for some help with the Gilman family.  He tells Carter that he can't find Kerry anywhere and he needs help.  A hospital attorney is on the way down.  Gallant explains that KoKo wants to get some sperm from her husband.  She is trying to get pregnant and has a short time to do it.  She has an electroejaculation technician there ready to collect the specimen.  Gilman's daughter doesn't want the procedure done, because she thinks KoKo is only doing it because she will only inherit his money if she is pregnant before he dies.  Carter gets called away and leaves Gallant to tend to this.  A patient is brought in after a three story fall through a skylight.  Chen and Carter are with the patient.  Carter needs more help and asks where Pratt is?  Chen tells him that he had to leave and that she is covering for him.  This upsets Carter.

NBC Review

GUN-TOTING DOCTOR'S BEHAVIOR CONCERNS CARTER WHILE WEAVER CONCEALS SECRET -- When Dr. Pratt (Mekhi Phifer) is caught bringing a gun into the emergency room, Dr. Carter (Noah Wyle) feels compelled to defend him -- but his colleague's erratic behavior makes even Carter have second thoughts. Meanwhile Dr. Weaver (Laura Innes) hopes to keep her pregnancy a secret, but physical complications might compromise her plans. Elsewhere, Dr. Lewis (Sherry Stringfield) keeps a wary eye on a self-destructive patient (guest star Rob Moore) who admits to molesting young boys; a guilt-stricken Dr. Kovac (Goran Visnjic) is warned by Dr. Romano (Paul McCrane) not to admit his fault to the grieving relative of a patient he treated; Dr. Chen (Ming-Na) treats some student math whizzes who overdosed on Ritalin; and Dr. Gallant (Sharif Atkins) confronts a scheming young wife (guest star Sofia Milos) who has designs for her dying husband. Maura Tierney also stars.