A/N: Since Greg and Casey are constantly moving around the cavern, their location will be titled 'Greg & Casey' The plot thickened in the last chapter, so what does this one have in store?

Chapter 5 – Double Cross

GREG & CASEY

"I think that was Sara who screamed."

"Are you sure?"

"I've known them longer than you have, Case. Catherine's screams are different to Sara's."

"And you know this because?"

Greg grinned at her. "Let's just say it's not only Nick and Warrick I play pranks on."

They were walking through the cavern where their colleagues were being held captive. Because neither of them were allowed to use firearms and only Casey was experienced in self-defence, they stuck together with homemade weapons made from rubbish found in Catherine's Tahoe. Greg held out a broken Bacardi bottle with several unbroken ones clipped to his waist with some elastic, plus a slingshot they had made with a stick and elastic. His supply bag of stones was full to the brim. Casey was armed with a pile of white cloths and a bottle of chloroform from Catherine's kit. She also had her mobile phone in case O'Riley (who was coming to their rescue with backup) tried to contact her, and Greg's Swiss Army Knife. Greg and Casey passed through various unguarded corridors with doors leading to rooms such as 'Lavatories', 'Testing Area 1' and 'Gas Chamber Spectators Room'. Greg found this one very interesting and tried to pull Casey in, but she pointed at the room next to it – 'Supply Closet'.

Inside the closet they found more suitable weapons to use to their advantage.

"Wa-hey! Look at this little beauty, Casey!" whispered Greg. He held up silver 9mm semi-automatic. "I'm taking this with me, it's our only chance."

"Yeah," agreed Casey, "these Blue Peter style weapons aren't gonna keep us alive for long, but we'll still need them." She took a sleek pistol from the middle shelf and some spare ammunition. "Take one of these," she said to Greg. She held out a silencer. "We may have to use stealth."

Greg nodded. "How about one of these?" He pointed at two automatic military rifles and a shotgun.

"No, we don't actually want to kill lots of people, just get past them. The guns are only for when things really start getting nasty for us. We should only use the chloroform and your slingshot  to begin with. Come one, let's go." Casey ran outside the closet and down the main corridor.

"Let's look in here," she said, opening the 'Gas Chamber Spectators Room'. Greg followed her with some pieces of thick rope around his waist. The spectators room was spherical and made of glass. About 7 feet below, sitting freely on the floor were Sara and Warrick. The electronic screen on the wall opposite them was counting down. At first, Greg and Casey didn't realise what it was going to do, but then realised what room they were in.

"Casey!" shrieked Greg, "what are we going to do? If we don't act fast, in thirty seconds Sara and Warrick are going to be filled with poisonous gas!"

Casey equipped herself with her pistol with the silencer and fired at the glass in front of her. "Tie the rope to the door handle and hang on!" she yelled.

Greg did as he was told and hung onto the rope tightly. Casey grabbed it as well and she pushed off. They almost reached the glass, a few inches in it. She tried again, this time with Greg's help. They tucked their heads into their bodies as they smashed right though the glass. Fifteen seconds left. They slid down the rope and Casey ran to Sara and Warrick. Greg started to climb back up again and cut off the biggest amount of rope he could manage. Eight seconds left. Warrick and Casey kicked down the flimsy door and took out the two guards outside it with a punch each. Casey handed Sara some chloroform soaked cloths and she put them over the guards' mouths.

"Let's go guys. Nick's about to be drowned or sliced up and Grissom and Cath are going to meet their fates as well. Oh, why us?!" whimpered Sara.

"One question. This gas is gonna eventually get to the whole building…" began Warrick.

"No problem," said Greg. He hit the 'Emergency Door' button and a heavy metal door slid down on both exits. "Done and done."

***

THE TANK

"Just like in Austin Powers," muttered Nick as he was forced onto a small platform above the tank and tied to it. The platform was attached to a metal pole. There was a whir of machinery and the platform began to slowly descend in the tank below. Once the platform was in, the metal lid of the tank would seal and he'd be trapped. The platform was descending really slowly. "Definitely like Austin Powers," he muttered again, "Someone should come now. Anyone?"

***

CREATURE ROOM

Culpepper himself forced Grissom onto a platform just like Nick's, only Grissom's platform was above a pool of piranhas. Culpepper climbed up a ladder to a glass room, where Catherine was tied to a chair. Evidently, she would be staying there against her own will and watch Grissom die, while Culpepper tortured Grissom both physically and mentally. As soon as Culpepper shut the door of the glass room he was in, several bugs were unleashed. They crawled across the floor so if Grissom escaped the fish, he'd get eaten up by the bugs. Like in The Mummy. Culpepper seemed fond of copying the films, especially as both Grissom's and Nick's platforms had unnecessarily slow dipping mechanisms.

Grissom looked up at Catherine. Tears were streaming down her cheeks from her beautiful sapphire eyes. Culpepper began the kissing act again, down her neck and on her face and lips. It angered Grissom to see her treated like that by a man like that. Tears slowly escaped Grissom's own eyes as he was getting closer and closer to his death.

***

THE TANK

Nick's time was running out. He was already in the water up to his neck. He could see slicing blades in the water below him. His chin touched the water lightly. He responded by standing on his tiptoes. He knew the end was near. He prayed for the others; even if he didn't make it, he hoped the others would.

BLAM!

The door was burst open and Greg, Casey, Warrick and Sara ran in. Sara ran to the controls and stopped the platform. Greg and Casey kept their guns trained on the three guards who had been guarding the door.

"Alright guys!" cried Nick, "you made it in time!"

"Sara, you know what to do," said Casey. Sara covered the guards' mouths with the chloroform soaked cloths. The party moved swiftly on down the main corridor. Nick left a trail of water behind them.

"Er, guys?" he drawled, "I'm wet."

"Yes we know, but we've got to more lives to save! Now shut up and let's keep moving!" whispered Sara sharply.

They encountered no more than twenty guards and escaped from all of them unharmed. They played it safe by letting Casey lead them then play an innocent little child if any guards came by. So professional, they were, from all the top espionage teams in the world. Yet so gullible. Casey threatened to shoot them and then Sara chloroformed them.

At last they entered the main chamber and found the glass room above the creature room.

"Alright Culpepper. You're surrounded. Hands up. Now!" yelled Greg. His gun was aimed at Culpepper's heart. Down below Grissom was climbing up the pole his platform was attached to. He took a deep breath and jumped. He grabbed the ladder still leading up to the glass room and began to climb. Warrick helped him into the room and locked the door so no-one would fall out. Sara untied Catherine while Greg still kept his gun on Culpepper.

Suddenly there was a click, making them all jump. They turned around to see none other than Casey Stokes, with her pistol pointing towards them

"Listen up. You can't get out. You are all stuck. You are going to do what I say and then, you die." The expression on her face was grim. Casey was serious.

"Double cross," whispered Greg.