Catherine wakes up the next morning to noise and music coming from the kitchen. She looks over to see that she is alone in bed. She gets up gets herself together and exits the bedroom to see Mark, Kerri and Elizabeth cooking, laughing, and dancing. Catherine smiles and walks towards them.

All of them noticing Catherine is joining them say, "Morning!"

Catherine says, "Morning all," and she takes a coffee mug from Mark.

Kerri turns to Catherine, "Want something to eat? We have made scrambled eggs, bacon, French toast, and hash browns."

Catherine says, "Mmmmm that sounds delicious!"

Elizabeth swallowing a mouthful of French toast, "Oh it is Mark is an expert breakfast maker, and griller, he can grill anything."

Catherine perks up, "Oh good I enjoy a good steak!"

Kerri nods, "Well then you're lucky you know Mark he fixes some of the best steak I've ever had."

Mark sits a plate in front of Catherine on the kitchen bar, "Thank you all for the wonderful compliments, but now she's going to be thoroughly disappointed when I burn her steak."

Elizabeth makes a face at Mark, "Oh yeah right you've never burnt a steak in your life. Quit being so modest. It's like why you won't admit you sing or play guitar really well."

Mark quickly changes the subject and asks Catherine, "What is the closest hardware store around here? I would really like to have a key made for Kerri and Elizabeth for when I'm working so they can come and go."

Catherine replies, "There's a Lowe's not far from here, does that work?"

Mark nods, "That will work. I was hoping there would be some places I'm used to shopping out here."

Catherine asks, "Have you been to Vegas before?"

Mark replies, "Yeah I have vacationed here but I wasn't really scoping out a Lowe's."

Catherine laughs and throws a napkin at Mark, "Smart ass! I was honestly just inquiring on whether you had visited before you moved, not if you had scoped out Lowe's."

Later at Lowe's …

Mark and Catherine are walking through Lowe's waiting on Mark's key to be made. They are looking at decks. "What do you think about this one?" Mark says to Catherine.

Catherine looks at it, "I like it but why are we looking at decks?"

Mark shrugs, "I like building things. Just thinking of maybe future projects."

Catherine laughs, "You do realize the complex probably won't let you do that."

Mark also laughs but nervously, "Well yeah someday I plan to buy a house, or you know you also have a house, if you like it we can build it at your house."

Catherine grabs Mark's hand, "Honey, you don't have to be nervous about making future plans. I don't know everything from your past but Kerri mentioned your past relationships haven't been the best. I know our situation isn't perfect with us hiding things at work, but I think this is something real. To be honest my past hasn't been great either. You know about my divorce. I don't think I ever told you why but Eddie cheated on me." Mark looks like he is about to interject. "No let me finish. Its fine I realized he wasn't the one for me and he wasn't good for me. I was working as an exotic dancer I had no aspirations for school or to become what I am now; it was all about making enough money to get high. A detective used to come in and give me case info and I would somehow be able to figure it out and he tried to encourage me to go to night school, I was stupid enough not to believe it. But then I got pregnant and everything seemed to change. I went to night school and started working at the lab as a tech and worked my way up. My relationships haven't been the greatest either; my marriage was a total disaster and I can't remember any other relationship that could even be considered something worth talking about again. Maybe we're meant to be together, two broken hearts finally given the chance they need."

All of a sudden Catherine is interrupted by Mark kissing her; they both come back to reality when they hear over the intercom that Mark's keys are ready. They blush slightly as they realize they were lost in the moment. Mark takes Catherine's hand as they go to pick up the keys. He says, "Would you like to grab lunch?"

Catherine flirtatiously bumps into him, "I would love that. Should we ask Kerri and Elizabeth?"

Mark says, "I think they had plans to go to lunch themselves, besides I would like a meal alone with my girl."

Just then Catherine's phone rings she answers, "Willows."

Gil says, "Catherine its Gil. I need you to come into work there's a double homicide down at the Tropicana. How soon can you be there?"

Catherine responds, "In about 30 minutes. I'm actually with Mark. We're in my car I have my kit but he doesn't have his, so we'll have to swing by his apartment and get it."

Gil a little confused, "Oh you're already with Mark? I was going to call him in to run with you on this, but since he's there with you fill him in."

Catherine says, "Will do, we will be there as soon as we can." Catherine hangs up the phone and looks at Mark. "We're on. Is your kit in your car?"

Mark says, "Yeah swing by and I'll get it and I'll have Kerri meet us downstairs so I can give her the keys."

Mark and Catherine walk to her SUV. Mark dials Kerri, "Hey Cath is going to stop by my Jeep for my kit we have been called in. I want to give you my keys so you can have the Jeep and I got apartment keys made, can you meet me in the parking lot? Ok, see you soon."

Catherine looks towards the passenger seat at Mark, "Not to freak you out but Gil seemed confused that we were together already. I'm sure it's nothing but he might ask us some odd questions later."

Marks laughs nervously, "Oh uh … that could be interesting."

Catherine pulls up next to Mark's Jeep he grabs his kit out of the back and gives his keys to Kerri that way Kerri and Elizabeth can use his Jeep. Mark puts his field vest on with his last name 'Anderson' on the nametag and gets back in Catherine's passenger seat sitting his kit on the floor by his feet.

Catherine says, "Ready to roll?"

Mark looks at her, "Let's go get some bad guys."

Catherine pulls into the back employee lot at the Tropicana. Catherine and Mark exit the SUV and walk towards the service entrance where they run into Capt. Brass.

Brass says, "Hey guys Grissom said you were on the way. Let me show you to the room."

Catherine and Mark follow Brass into the hotel room. Brass looks at his notepad and begins, "Two victims, names are Jill and Gary Smith. Jill was found shot twice on the other side of the bed. Gary was found here by the bathroom looks like a stab wound to the chest and a shot in the stomach. Some things appear to be rummaged through could be a robbery gone bad, but that's why we pay you guys the big bucks. These bodies were found by the hotel manager Holden Grooms after guests called in the shots fired, he checked it out and called us immediately."

Catherine looks up, "Thanks Jim. Do we need to interview the hotel manager?"

Jim responds, "No I got it. Besides I want to see Mark here work his forensics magic and not waste it taking an interview." Brass pats Mark on the shoulder and walks out.

Mark looks at Cath, "I know he was on my interview committee but am I known around the office for having some forensics magic?"

Cath responds, "Well whether you think it or not your resume and solved cases are pretty damn impressive."

Mark walks toward the female victim he notices there are some dark hairs in her hand. "Cath look at these dark hairs in her hand."

Cath walks over from photographing the male victim. "Good catch. That doesn't match her hair or the male vic's hair, let's hope she got a piece of the attacker."

As they finish processing the hotel room Brass comes in, "I talked to hotel security and got a DVD copy of what looks like our suspects leaving the hotel room and escaping through the fire escape."

Mark walks into the hall, "Which way is it?"

Brass asks, "The fire escape? This way. Why?"

Mark says, "I want to look at it. I have a hunch they might have left something behind."

Brass leads Mark and Catherine to the fire escape.

Mark looks around takes out his camera and flashes some pics.

Catherine asks, "What do you see?"

"A muddy foot print." Mark says collecting a sample of the dirt. "Could be nothing …" Mark trails off as something else catches his eye and he moves towards something else.

"What is it?" says Catherine.

Mark takes another pic and gets out a swab, "We might have just gotten lucky … we have blood."

Brass smiles, "Oh I like this guy. Not everyone would have come out here to process this fire escape."

Catherine locks Mark in a look, "Yeah he's pretty amazing."

Brass coughs interrupting the moment Mark and Catherine were sharing, and he noticed something but chose to keep it to himself.

Brass asks, "Are you guys going back to the lab to process?"

Catherine turns to Jim, "Yeah we'll let you know if we line up a suspect."

In Catherine's SUV on the way back to the lab she turns to Mark and says, "You know that instinct to check out the fire escape was really good … and really sexy."

Mark smiles and grabs Catherine's free hand and holds it as she drives. Mark says, "You're pretty sexy yourself I'm thinking we may have to go back to your place after work and stop taking things so slow."

Catherine blushes slightly but says, "You've got yourself a date there!"

Back at the lab …

Mark and Wendy are running the blood and hair samples from the case. Wendy is playing Sheryl Crow's Greatest Hits in the DNA lab.

Wendy asks Mark, "So how are you liking Vegas so far?"

Mark replies, "So far I really like it."

Wendy says, "That's good. Wait hold on that blood you found on the fire escape is a match to the male vic. So it looks like that was the way the suspect chose to leave."

Mark replies, "Alright we're getting somewhere. Where is that hair sample I collected from the female vic's hand that Cath and I think it could be the suspects?"

Wendy looks around and grabs a vial, "It's right here let's see what we got."

Catherine walks in and looks at Mark, "Any luck partner?"

Mark says, "Maybe. Wendy matched the blood sample from the fire escape to our male vic, so it looks like that is the route the suspect used to leave."

Catherine responds, "Nice. I ran that muddy foot print through the database and found that it is a match to a popular steel toed work boot."

Mark looks at Catherine, "So perhaps we're looking for some kind of construction worker or maintenance …"

Wendy interrupts, "Guys this hair may have just broke your case. You were right it was not a match to either victim. It matches up to a suspect from a previous case 2 years ago his name is Charles Grance, a construction worker, he was never found and the case remained open it was a murder of a woman and it was a suspected robbery."

Catherine says, "I'll call Brass and get an APB out on this guy. Hopefully they'll find him this time."

Mark looks at Wendy before leaving and says, "Nice job Simms you just earned yourself a drink! See you later."

A few hours later Mark's phone is ringing he answers, "Anderson."

Brass says, "Mark its Brass we tracked this guy down and guess what we found a gun and a bloody knife in his backseat. I'll bring him in for questioning but I'm going to go ahead and say congrats for closing this case and another one this bozo was involved in from 2 years ago."

Several hours later in the locker room ...

Mark is putting some things away before he leaves. Gil walks in and says, "Great job today I'm going to have to either put you in the field more often or team you and Catherine up all the time."

Mark smiles and says, "Thanks Boss."

Grissom looks at him and asks, "Some of the team is going to breakfast would you like to come?"

Mark responds, "I'd love to but I already have plans and since I rode in with Cath she's giving me a ride home."

Grissom says, "Alright see you tomorrow."

Grissom runs into Cath on her way into the locker room. Grissom says, "Hey Cath I know you have to take Mark home, but some of the team is meeting for breakfast if you want to join us."

Catherine responds, "Thanks Gil but I already have plans." And she continues on into the locker room.

Leaving Gil standing in the hall wondering about all the time Cath is spending with Mark.