Thank you for all of the follows and reviews. This is my first stab at a multi-chapter story, so you're all very much appreciated.

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Five-0 Headquarters – 11:30 AM

Steve looked at the caller ID and didn't recognize the number, so he gruffly answered "McGarrett."

"Commander, Commander… I'm assuming that tone in your voice means you found Sally this morning." Steve immediately turned to Danny and put the phone on speaker so they both could hear.

"Who is this?" Steve questioned.

"Oh come on now Commander. You haven't been gone from the SEALs that long, have you? Are you getting a bit slow in your old age?" The man laughed.

"What have you done? Where's Lt. Rollins?" Steve swallowed and started to fear for the worst.

Danny saw the look on Steve's face, stepped a few feet away from Steve so the voice on the phone wouldn't hear him, and immediately pulled his phone from his pocket and dialed Catherine himself. Unfortunately, he got her voicemail, just like Steve did. He then called Chin and Kono. "Guys, get back to HQ now!" Not waiting for them to respond, he hung up and turned back towards Steve.

"Right about now, Lt. Rollins is at home receiving a Valentine's Day delivery from you Commander; a big nice bouquet of red roses with a sappy note expressing your undying devotion and love. Just what any girl would want to get from her man, am I right? Seemed appropriate considering what today is." The voice was now serious and lacking all emotion. "By the time you get to her it'll be too late McGarrett, just like it was for my baby brother."

"YOU SICK BASTARD!" Steve screamed. "What have you done? And why now after all this time?" If Steve wasn't panicking before, he was now.

While Steve talked, Danny tried calling Catherine three more times, but it kept going to voicemail. Danny was now just as panicked as Steve was, so he called Dispatch and sent a patrol car to the McGarrett house and warned them of a potential threat to Catherine.

"Why now? You actually have the gall to ask me 'why now' after what my brother suffered through? If it wasn't for Lt. Rollins' intel and YOU leading Andy to his death, he'd still be here! SO DON'T FUCKING ASK ME 'WHY NOW'!" The voice on the phone screamed.

Just then, Steve saw Kono and Chin running into the office. Steve paused and waited a moment before responding to allow Chin and Kono to get within earshot of him so between what Steve had told Danny in the car, and what he was about to say, they'd all catch on and know what to do.

Steve looked at his team and then spoke calmly. "Tommy, what happened to Andy was horrible, but he knew the dangers when he became a SEAL. He swore to protect our country and its people. He was protecting you, Tommy. Andy sacrificed himself so YOU could live." Steve paused for a moment and the silence made Steve hopeful that he had reached Tommy and that he would stop this before it was too late. "Let's stop this Tommy before more people have to die. You already killed Sally. I'm guessing that's how you found out about Catherine."

At this point, Danny had all of the information he needed to give to Chin and Kono so they could search for Tommy Green. In a low voice, he started telling them what he knew. "Okay, here's what we've got. The sicko on the phone is Tommy Green. He's the older brother of Andy Green, one of Steve's SEAL brothers that died during a mission six years ago today. It seems he used our victim this morning, Lt. Parker, to gain access to mission op information and found out that Catherine was the Naval Intel Officer on the op that got Andy Green killed."

Chin and Kono both started typing away on the tech table keyboards trying to pull up as much information as they could. Chin started to trace the call. While the trace kept bouncing from tower-to-tower all over the world, Kono searched for information on Tommy Green. What popped first was easy to find. Tommy Green had lived right here on Oahu and was a former chemist for the CDC until he disappeared three months ago. As they kept searching, Danny continued telling them the whole story.

"Andy died after the mission was over, but it was from an unidentified poison that he had come in contact with. They weren't able to find an antidote in time before he died. Steve and the rest of his guys were quarantined for two days after the op to make sure they hadn't been infected. And now he holds Steve and Catherine responsible for Andy's death."

"Ah, very good Commander." Tommy spoke more calmly now, which worried Steve. "Sally figured out I was just dating her for information. I couldn't let her tell Lt. Rollins or you, now could I? You see, Sally and Andy had a thing before he died. So it was easy to be the distraught brother and supportive friend. It took no time for her to fall for me and after that it was just a matter of time before she started doing favors for me."

"Is this what Andy would've wanted? Because Tommy, if anything has happened to Catherine, I will kill you." Steve gritted through his teeth.

Just then, Danny's phone rang. Steve looked up hoping that it was Catherine. Danny shook his head no and quickly answered. He looked Steve straight in the eyes as he said "Okay, thanks" and then hung up. Steve knew it wasn't good when Danny walked emotionless towards him never losing eye contact.

Steve couldn't control himself now. "GOD DAMN IT TOMMY! I AM GOING TO HUNT YOU DOWN AND KILL YOU!"

"Tsk, tsk Commander. Now you'll suffer losing someone close to you just like I did. You'll never find me and you'll never find the antidote." Tommy said, not realizing he just gave Steve hope that he could still save Catherine. Suddenly, the call went dead.