William and Olivia arrived at the park where they were playing football. More like William was playing in Olivia's spot since she was pregnant.

Elliot and Casey were sitting on a bench waiting along with more NYPD members.

Casey quickly got up seeing their quarterback. "Hey."

William nodded. "Hey."

Casey looked at all the guys and some women. "This is William Grant. Benson's boyfriend. He is filling in." Casey grabbed an NYPD t-shirt and tossed it to William. "Get in uniform."

William shook his head and took off his t-shirt. He heard a couple guys whistle to tease him about his muscular body. He smiled shyly and pulled on the navy blue NYPD t-shirt.

Elliot spotted the team from the Fire Department coming toward them. "They are here."

William looked over and saw most of the firefighters were extremely built. On his team only him, Elliot and maybe two more guys looked like that. He gulped a little.

"You any good Grant?" One officer asked. "FD is kind of rough."

William nodded. "I lead my high school to state champs." He answered. "I think I still got it."

The officer nodded and tossed him his belt flag. "No tackling."

William nodded and pulled on the belt to play flag football.

Olivia looked over at him. "Sure you want to do this?"

"Why not? It's just a game."

"These guys are assholes."

"I'm a US marine Olivia." William smiled. "I can handle it." He gave her a kiss and ran out on the field.

Everyone got in position. The captain of the FD team came over. "Robert Callaway."

William shook his hand. "William Grant."

"Good luck Grant." Callaway snickered and walked away.

William raised an eyebrow but didn't pay much attention to it. They already decided offensive and defense.

William stood behind Elliot who was throwing him the ball. The ball was thrown to him. He instantly threw it half way down the field to another team member. Everyone stared in shock by the arm William had.

All of a sudden, the NYPD member got tackled down.

William looked very confused. He looked over at Callaway. "That's a foul captain. We're playing flag football."

"What's wrong? Can't take it?" Callaway laughed and walked away.

William nodded and went over to Elliot. "Can you throw?"

"Yeah." Elliot nodded.

"Pass it to me." William told him and went long.

Elliot got the ball and instantly passed it to William.

Callaway attempted to grab William but William simply dodged him. He kept running. He grabbed one opposing team member by the shirt and threw him down before he got to the touchdown.

Callaway instantly got in William's face. "What the hell was that?"

"What?" William asked. "Can't take it?" He tossed him the ball and walked away.

Casey went over to William. "Is this going to get rough? I really don't want to be tackled down by a fireman. Hot as they are, not the day for me to get hurt."

William looked over. "Why don't you sit out on this one ok?"

"Gladly." Casey nodded and ran off field. It was now mostly men on the field.

"Hey Grant, want to play this like men? Real football?" Callaway smiled.

William nodded and took the flags off his belt. "Let's go." All the men took their flags off.

Olivia went over to her boyfriend. "Babe…I know you're a crazy marine…but these guys are merciless, they will give you a concussion if they have to."

"It's fine. I run like a bullet." He gave her a kiss. "Don't worry your pretty little head." He went out on the field where it instantly became intense.

In a matter of half an hour, Elliot was tackled down, Callaway had a broken nose and William was tackled down by two men.

They were sitting on the bench for half time. Olivia was shaking her head. "You guys are going to get killed."

"We're fine." William told her. "Elliot you fine?"

"I'm good." Elliot nodded and placed ice on his neck.

As they were about to go back out, William's phone rang. He looked at who was calling him and instantly got serious. "Sergeant Grant." He listened for a little while "Yes sir…I understand sir…I will take care of it personally sir." He hung up the phone. "I have to go."

"What?" Elliot asked. "Now? We need you."

"It's official business." William answered. "Sorry." He grabbed his hoodie and quickly ran to the car.

Olivia followed. "What's going on?"

"One of my privates is in a hostage situation."

"What? The cops handle that."

"It's the colonel's son." He answered and gave her a kiss. "Can Casey drive you home?" Olivia nodded. "I'll see you later." He got in the car and drove off.

Olivia stood there for a second when her phone went off. She answered it. "Benson…I'll be right there." She got the same call as William. There was a child involved. She looked over at Elliot who was grabbing his stuff since he got the same call as her.

--

Olivia and Elliot pulled over at the scene. They spotted a bunch of marines walking around with automatic weapons. "This is a circus." Elliot stated as they went out.

They instantly spotted William in his camouflaged uniform and his bullet proof vest on. He was arguing with a police officer.

"This is not your jurisdiction sergeant!" The officer yelled.

"This is my military base officer! You stand down!" William yelled back.

"Don't make me arrest you Sergeant!"

"Screw you! Don't make me get you shot!"

"Is that a threat?"

"It will be in five seconds if you don't order your men down!" William yelled in his face.

"Your private has a gun to a child's head!"

"Order your men down officer!"

Elliot and Olivia got in the middle of it. "Hey, Calm down." Elliot showed his badge to the officer. "What is going on?"

"We're about to get this jarhead arrested, that's what" the officer smirked.

William instantly slugged him across the face. The officer punched him back. In an instant, all the marines had their weapons pointed at the officer. The cops around instantly pointed their weapons at the marines.

William got off the ground and wiped his lip. "Order your men to put their weapons down." The officer stared at him. "My men have no problem killing you. And if you haven't noticed, you are the only one without a vest here officer."

The man nodded. "Put your weapons down." The cops did as told.

"Weapons down." William ordered. The marines put their weapons down. "Now will you let me work? Or you want to fight over the glory?" William walked past them. "No one gets past this point." He told the marines. All nodded.

William moved closer to the house. "Nicholas!"

"Will?" The man from inside asked.

"Yeah man, what's going?" William kneeled down and pulled out his gun.

"A misunderstanding."

"Alright. Do you have Jeff in there?"

"Yeah."

"You have to let him go Nicholas, he is only a kid. He is your son." William called over.

"I can't. I do and they will get in here and kill me."

"No one is going to kill you Nicky, I just got in a fight with a cop. I'm not letting anyone touch you."

Elliot and Olivia exchanged looks seeing William was rather calm as he loaded his gun. They weren't sure what he was doing but he was getting progress.

"What happens when I let him go?" Nicholas asked.

"I come in there and I take you in personally. No one else."

"Alright. I trust you." Nicholas came out of the house with his son in front of him. "I'm going to jail aren't I?"

"Yeah." William nodded and held his gun to his side as he stayed down on one knee. "Throw your weapon down and let that female detective take Jeff." He motioned to Olivia.

"You said only you."

William nodded. "That officer is carrying my child. I trust her. I need you to trust me and let her take Jeff before any more harm happens."

Nicholas shook his head. "I can't go to jail. Not like this." He held up his weapon to his son's head. He was about to pull the trigger.

William instantly lifted his gun and shot Nicholas straight in the head. He quickly ran over and grabbed the boy. "C'mon" He covered his eyes and instantly carried him over to Olivia.

Olivia took him and carried him over to the car.

Elliot went over to William. "I thought he was your friend."

"He was." William nodded. "I did what I had to do." He handed Elliot his gun and placed his hands on the back of his head. "You going to arrest me?"

"You're a US Marine Sergeant under a military base. I can't arrest you." Elliot answered.

William nodded and took the gun back. "Thank you." He pulled off his bulletproof vest and walked away.

--

Olivia came into the apartment later that night and spotted William staring blankly at the turned off TV. "Want to talk about it?"

He glanced over at her. "Huh? No. I'm fine."

Olivia nodded and sat down by him. "Don't lie to me."

He shook his head. "There is nothing to talk about. I knew Nicholas for more than ten years. I knew he had some issues. Never thought he would attempt to kill his own child."

"Why did you kill him? You could have just wounded him."

"I'm a trained killing machine." He answered. "Plus…I couldn't let him go to jail. He deserves more dignity then that."

Olivia nodded. "Do you want me to hold you? That helps me when I'm feeling down."

He smirked a little. "Yeah."

She laid down on the couch and pulled him down. "It will be ok."

He gently rubbed her baby bump. "When will he come out? I want to be a daddy already."

She smiled and kissed his forehead. "You'll be a great dad." She whispered and just held him.