Mark is still in the bathroom as Elizabeth pulls up. Catherine still hasn't gotten a chance to talk to him. She says, "Mark, Elizabeth is here I'm going to go out and talk to her, come out when you're ready."

Mark says, "Ok I'll be a few more minutes."

Catherine leaves her bedroom, walks down stairs, and opens the door. She waves at Elizabeth as she walks towards the driver's side of the Jeep and says, "Hey how are you?"

Elizabeth nods and responds, "Very nervous."

Catherine pats her on the shoulder and says, "Don't be. Jim Brass is one of the nicest guys you will ever meet. Just be yourself and it will be fine. Mark should be down anytime he was still in the bathroom when I came down stairs."

Elizabeth laughs and asks, "So what happened with you two last night? You don't have to answer if you feel it's too personal."

Catherine blushes slightly and responds, "Well I can definitely say we aren't taking it slow anymore. I really like Mark though, we haven't really had a chance to talk since last night, well at least not about us."

Elizabeth smiles and says, "Cath, Mark is one of the greatest guys I know. He had a lot of bad luck in the past. His heart is really big and I think he let too many people in that really didn't care about him, which is why he hasn't let anyone in for quite some time. I've seen you two together though, and he seems to be changing from his old miserable self to a happy person in a relationship. I have a feeling about this, Kerri said the same thing,"

Catherine smiles at Elizabeth.

Mark walks out of the house and towards Catherine. He says, "Catherine did you talk her out of being nervous and tell her she'll be great?"

Catherine looks at Mark and says, "Pretty much."

Mark looks at Elizabeth and says, "Thanks for coming to get me."

Elizabeth says, "No problem, this is your Jeep after all."

Mark turns to Catherine and gives her a goodbye kiss and says, "See you at work, babe."

Catherine says, "See you later."

Catherine waves at both Elizabeth and Mark and disappears into the house.

Elizabeth turns to Mark and asks, "So how did it go last night?"

Mark replies, "I'm pretty sure I'm in love."

Elizabeth shocked says, "Wow I haven't heard you say that in a long time. Must have been some amazing sex," she laughs.

Mark looks at Elizabeth and smiles and says, "You have no idea. It wasn't just amazing sex either; I felt we were really connecting. I don't really know how to explain it."

Elizabeth and Mark pull into the diner. Mark sees Warrick and waves. Mark turns to Elizabeth and says, "Thanks for the ride. Good luck. Text or call me when you're done and I'll meet up with you if I'm in the lab."

Elizabeth says, "Ok," and drives away.

Warrick asks, "Girlfriend?"

Mark shakes his head and laughs then says, "Nah, her girlfriend Kerri probably wouldn't approve."

Warrick says, "Oh wait Cath did mention that your friends Kerri and Elizabeth were in from Ohio."

Warrick and Mark walk into the diner. They see Greg, Nick, and Archie already seated and they join them.

Warrick says, "Look who I found everyone the new prodigy around the office."

Everyone laughs and says, "Hey Mark."

Mark says, "Hey guys."

Nick looks at Mark and says, "Yeah I heard about your big break in that case yesterday and that it also solved a case from 2 years ago because it was the same guy they just never found him."

Archie jokingly says to Mark, "You keep that up you'll never be available to help me in the AV lab."

Mark looks at Archie and says, "I'll make sure I do really bad on my next few cases."

The waitress comes over to bring their drinks and says, "I see you boys have added a newcomer to the group. What can I get you sweetie?"

Mark says, "I'll have a Coke."

The waitress winks at Mark and says, "You got it!"

Nick laughs and says, "Man I think our waitress likes you she never calls any of us sweetie, I think you have some kind of weird power over women."

Mark shakes his head and says, "I would have to disagree with you and my past relationships would as well."

Archie chimes in, "No I think Nick's right. Day one in the lab after meeting Catherine she touched his shoulder and then later than shift he went to get something to eat with her and Lindsey. How many people at this table have been out with just Catherine their first day here?"

No one speaks up.

Marks blushes slightly thinking of Catherine. Warrick notices. Mark says, "Have you ever thought that I have no power over women and you guys just really suck when it comes to women, so exponentially with my normal luck it seems like some kind of power."

Warrick laughs and says, "I think he's got you all there."

Archie speaks up and says, "Mark likes gaming we had a conversation about Call of Duty the other day. I think we need to plan some gaming marathons soon guys."

Everyone responds, "Yeah, sounds great."

The waitress brings Mark his Coke, "Here you go dear. Do you all want your usual of bacon cheeseburgers and fries?"

Everyone nods.

The waitress looks at Mark and asks, "How about you dear?"

Mark smiles and responds, "The usual sounds great."

Everyone is paying their check and Warrick asks Mark, "Do you want a ride in?"

Mark nods and says, "Sure that would be great."

Warrick pulls in the back lot next to Catherine's SUV. Mark gets out and says to Catherine, "I need to get my kit from the back of your SUV."

Catherine smiles and jokingly asks, "What are you afraid we aren't getting teamed up tonight?"

Mark laughs and responds, "Could be, we did kick total ass yesterday."

Warrick interjects and says, "Nah Cath this prodigy is with me tonight I need to witness his skills."

Catherine says, "Don't forget I'm like half boss, half of what I say goes."

Warrick, Catherine, and Mark walk into the lab joking and laughing.

Everyone gathers in the break room for assignments. Grissom enters and says, "Warrick and Catherine you guys are on a burglary. Nick and Sara you two are on a possible suicide. Mark and Greg you guys are on explosion scene, bomb squad has cleared the scene, but be on alert anyway."

Greg and Mark walk to Greg's SUV. Mark puts his kit in the back of Greg's SUV and puts on his field vest.

Greg and Mark are driving to the scene when Mark gets a text from Elizabeth.

Elizabeth: Hey I finished my tour I think it went well. Are you still here?

Mark: No I'm on my way to an explosion scene. See you tomorrow.

Elizabeth: That sounds interesting. Be careful.

Greg asks, "Who are you texting?"

Mark replies, "Elizabeth. Catherine set her up on a tour with Brass. She's interested in the department. She just finished and wondered if I was still around."

Greg nods and says, "That would be cool if Elizabeth got on at the department, she seems really great."

Mark looks at Greg and responds, "Yeah she's a great beat cop, and she's taking her detective test soon. So if she transfers I doubt it would be before that."

Greg asks, "What does Kerri do again?"

Mark replies, "She's a school psychologist currently. I know she would like to get more involved in research though."

Greg nods and says, "I was wondering if it was forensic related and we could get her on at the lab, if Elizabeth got a job with the department."

Mark asks, "Would they be able to work for the same place being romantically involved?" Mark was really inquiring for the relationship he was pursuing with Catherine.

Greg replies, "You know I'm not sure. I've never really tried to date anyone in the department. I mean I've flirted with Sara over the years, but she never seemed interested so I didn't pursue it much further than harmless flirting."

Greg and Mark pull up to the scene. Mark says, "Looks like the exterior held up, I wonder what's left inside?"

Greg replies, "Not much I bet. Our main concern here will be finding the source and then figuring out whether it's criminally related."

Greg and Mark retrieve their kits from the back of Greg's SUV. Greg and Mark walk toward the building. A member of the bomb squad walks toward them and looks at Greg and says, "Our men have done an initial walkthrough and there doesn't appear to be anything active left in the building, but exercise caution and let us know if you see anything suspicious."

Greg nods and says, "Will do."

Greg and Mark walk into the building taking out their flashlights and looking around to find what looked like a giant pile of rubble. This wouldn't be an easy one. Mark follows Greg who says, "The blast looks like it came from here."

Mark stops to take a few pictures as Greg assesses more of the scene. Greg sees something that catches his eye it appears to be a flashing light. Greg says, "Mark take a look at this."

Mark comes over and they immediately hear a beeping coming from the same area. Mark's instincts kick in telling Greg, "Run!"

Mark takes off running seeing Greg right behind. When they are about 20 feet from the door the bomb goes off sending Mark and Greg out of the building and violently landing on the ground.

A 911 immediate assistance call comes across the radio and Catherine hears this with a horrified look on her face. Warrick looks at her and knows they need to pack up and head to the scene to assist.