The situation

It's been a long shift for Dr. Will Halstead and his Fiance Dr. Natalie Manning, but it was just about to get longer.

"It's getting late you just want to order i…." Natalie started to ask Will, when they stopped dead in their tracks.

You.!" He snapped at Maggie.

"Me?" Maggie asked confused.

"Pick up that phone and call the police!" He snapped at her as he waved his gun around.

"Excuse me, sir, but did you just ask for her to call the police?" Natalie asked him, as she stepped forward, as Will tried to hold her back.

"Yes! Are you deaf!" He snapped as he pointed the gun at Maggie. She picked up the phone and was about to dial, when she noticed the shooter taking notice of Will.

"Get over here, Dr. Manning!" He snapped as he looked over at Natalie. She started to walk over, realizing this man had friends holding the whole ED at gunpoint.

"Wait, Wait, if you need a hostage, take me." Will said as he stepped in front of Natalie.

"Get over here, then!" He snapped at Will. He walked over to the man, who tightly gripped his shoulder, forcing him up against the nurse's station. The man heard sirens coming closer.

"What did you do!" He snapped at Maggie.

"I only want the Intelligence Unit! Any other uniform comes in here, and I'll start killing people!" He snapped at her.

"Pick up the phone!" He snapped at her.

"Stop, Maggie, put the phone down. I have a direct link to the Intelligence Unit." Will said trying to get him to loosen his grip.

"How that?" He asked Will curiously.

"Detective Jay Halstead is my brother. Just let me call him." Will told him.

"How do i know you're not lying to me?" He asked Will.

"Look at my badge." Will told him.

"Halstead." He said out loud.

"Yes. I'm not lying to you." Will told him.

"Keep them here. Let's take a walk Dr. Halstead." He told Will as he forced Will to walk up to the roof.

"Why are we up here?" Will asked him.

"Call your brother!" he snapped at Will, who reached in his pocket and pulled out his cellphone and dialed Jay.

"Hey Will. Are you okay? I hear there is a incident over at Med." Jay said as he started to grab his sidearm.

"I'm fine, Jay." Will told him. Jay knew that Will was lying, so he asked Will their secret phrase.

"Are you with the shooter?" Jay asked him.

"Yes, Jay, Owen's with the babysitter." Will said.

"Stay put." Jay snapped. Will was about to hang up when the man pointed his gun at Will.

"Tell him. Just the Intelligence Unit! No other Uniforms!" he snapped at Will.

"You hear that Jay?" Will asked into his phone.

"Got it. Just stay put!" Jay said ending the call.

"He's on his way over." Will told him, going to put his cellphone back in his pocket.

"Give me your cell phone." He told Will, reaching his hand out. Will placed the phone in his hand, and watched as he through Will's phone off the roof.

"Hey, man, that was a new phone." Will said sarcastically.

"Sit down." He told Will pointing to the concrete. Will did as he was told.

"Do you want to tell me what this is all about?" Will asked him.

"When Intelligence gets here!." He said, frustrated at how long it was taking.

Minutes Later, Will could see the Intelligence Unit pull up outside of the E.D.

"Chicago PD! Drop your weapons!" Voight, Antonio, and Atwater said as they stormed into the E.D.

"Where's Will?" Jay asked Natalie after sneaking in a back window.

"I'm not sure, they went that way." Natalie said pointing to a sign for the stairs.

"Thanks." Jay said as he ducked down behind hostages and made his way towards the stairwell.

"Natalie said Will and the shooter went up the stairs." Jay said into his two-way radio.

"Upton, Burgess, Ruzek, clear each room on the first five floors, Jay you've got the other three." voight commanded.

"Got it, Sarge." They all echoed. Hallie, Kim, and Adam stayed close to each other as they cleared each section of the lower levels. Jay had just finished clearing the sixth, seventh, and was on the eighth. When he heard commotion on the roof.

"Where is your brother! You lied to Me!" He said as he forcefully yanked Will up off the ground.

"Will!" Jay yelled as he came bursting through the door that lead to the roof.

"The Intelligence Unit is here, so let my brother go." Jay said raising his gun.

"I will, as soon as you help me." He told Jay, his frustration turning to sadness. Jay noticed the change in his facial expression, but didn't let his guard down.

"What do you need?" Jay asked him.

"Help her, my daughter." He said pointing to the ledge. Then it clicked, Jay knew his daughter, and he wanted Jay to get her to get away from the ledge.