Summary:- A H50/SGA crossover as I wanted my two favourite men working together. When Steve and Danny find an unconscious man lying on the beach they have no idea who John Sheppard is, or the impact he and his team will have on their lives. A wild ride with whump galore for Steve and John, but I even spare some for Danny too. If you've never read a crossover before, give this one a try!

Disclaimer:- Neither H50 or SGA are mine. But I'd sure like to be the towel girl in H50!

Warnings:- There is humour in this fic, but the subject matter gets very dark, with some bad language. The rating will change to 'T' in later chapters.

Many thanks to my two experts. Sherry57 for knowledge of all things Five O, and to my wonderful beta Sterenyk Strey for sorting out my grammar. I also want to thank both of them for their great suggestions which helped make this a better story.

A/N:- For those who've never read my work, I only start posting when the story has been fully drafted, but as it is still getting edited and beta'd, my posting schedule will be three times a week to begin with - I hope you enjoy it.

WHEN WORLDS COLLIDE.

CHAPTER 1

He could do this. All he needed was to keep moving, put one foot in front of the other and ignore the pain, ignore the voices screaming in his head – they weren't real. Failure wasn't an option, he must stop them, but there was something else too, something important he needed to remember…

John tried to grab at the memory, but it was elusive, as hard to catch as the sand slipping through the cuts on his bloody feet. His head throbbed, pounded with every step. He couldn't think, could barely see, could hardly keep going on limbs that felt like lead. Each step tortuous as he staggered, stumbling along the beach, blinded by the swirling, flashing colours obscuring his vision, and stinging his eyes.

It was cold, freezing, but the sand felt strangely warm, gritty, beneath his aching feet. He was shivering, desperate to wrap his arms around his body to get some warmth, but they were trembling, shaking so hard he couldn't get a grip.

Time seemed to have stood still since he'd escaped, and John didn't know how long he'd been running, as he stumbled, falling as if in slow motion, onto the ground. Too beat to move, his strength long gone, he knew his adrenaline couldn't take him any further. Helpless, he could only lie there, frustrated, angry at himself for getting caught, furious for failing. Unable to warn his people, the bad guys would succeed in their plan, and it tore him up deep inside to know he'd let everyone down…

ooooOoooo

Maybe it was karma, of the good variety, giving them a break for a change, but apart from the usual spate of muggings which appeared along with the summer intake of tourists, major crime seemed to have taken a vacation. For days there had been nothing serious enough for Five O's attention, but for once Steve didn't mind the lull in activity.

Pretty much hyperactive since he was a kid, Steve normally hated sitting still. He'd been, and still was, only happy when in perpetual motion. Something that used to bug his mom big time, as he'd been always getting into scrapes, becoming such a frequent visitor to the ER all the staff had known him by name. Still, it had been a weird, stressful few months since Dad died, so he was grateful for the break from the wild ride he'd begun ever since returning to the island. In any case, there was something he'd been meaning to do for quite a while.

"Hey, Danno…you ready yet?"

He heard shuffling behind the door then Danny appeared, red faced, looking uncomfortable in a pair of the loudest yellow flowered shorts he'd ever seen.

"Whoa…nice shorts -" Steve's eyes went wide, and his lips twitched, but he was pleased with himself he managed not to laugh.

"Go on – laugh. I can see you want to, so get it out of your system before you bust a gut." Danny stood with his arms folded, staring at him, daring him to actually do it. "This is your fault, McGarrett - I hold you totally responsible. Ask Kamekona you said. He'll fix you up with the right gear – if I thought for one freaking minute you'd set me up!"

Steve choked, finally giving way to the laughter. "Me? Hell, no! Do you seriously think I would have arranged that outfit? I have to hang around with you looking like that!"

Danny screwed up his face. "Gee…my heart bleeds for you - tell you what, smartass, why don't we just forget it. This is a dumb idea anyway."

Steve went over and slapped him on the back "Come on, Danno, they're not that bad. Anyway, Surfing's really cool – you'll love it." At Danny's sceptical look, he realised he would have to bring out the emotional hardwear. "Think about Gracie. How impressed she'll be when she sees her dad riding those waves..."

"Falling flat on my ass – oh, yeah, she'll be well impressed." Danny grumbled, wearing a sour expression as he picked at the bright yellow shorts like they were road kill.

"Seriously, man. You've come all the way down here, and it's quiet at this stretch of beach – no tourists." No witnesses to see him fall on his ass. "At least not many, and with a guy of your talents, it won't take long to get the hang of it." Steve said, trying to sell it. "Tell you what; I'll even buy you a new pair of shorts for next time - well, what do you say?" Steve could read Danno like a book, and by the conflicting emotions flitting across his partners face, knew he'd nearly got him.

Danny blew out a long sigh. "Fine, if we're going to do this thing, then lets go – but how the hell am I expected to learn with this pile of crap?" Danny produced an old faded wooden surfboard that looked like it could've come out of the Ark… if the Ark had surfboards. It felt spongy to the touch, and was similar to one his dad would have used. Come to think of it, Steve thought it looked kinda familiar.

He made a mental note to have a quiet word with the big Hawaiian later, in the meantime he wasn't going to let this opportunity go to waste. "Leave it. I've got a spare board you can borrow. Now unless you have any other objections - let's go."

ooooOoooo

Danny reckoned he'd be covered in bruises tomorrow, and had swallowed at least enough water to meet his sodium requirement for the next eighteen months, but although he really hated to admit it – he'd finally found something in Hawaii he enjoyed.

For a rookie Danny reckoned he was pretty good at this, not too shabby at all. It hadn't taken long to get his balance, managing to stay upright, even if it was only for a few minutes. He could tell McGarrett was impressed, so when Steve waved, and smiled from the beach, just for a second he forgot to be pissed, and smiled back. Steve was right, this was cool, and he knew Gracie would love it, especially if her old man could get good enough to teach her the ropes. What his own pop would make of it, he could only guess.

Danny reckoned his dad, the original Jersey boy, would be surprised at his son, but hey, he was surprised at himself. It was less than a year ago he'd left his home, and his family, friends, to follow his daughter after his ex dragged her to Hawaii. For a long time he'd been angry at Rachel from forcing him to give up a life he enjoyed, to come to this sand infested hell hole, but he'd sucked it up, only putting on a smiley face for his daughter. Now, after joining Five 0 and meeting McGarrett, well, despite his initial misgivings about working with the kamikaze stranger, things had turned out okay. Danny was still a city boy at heart, and didn't think he'd ever be crazy about the beach, but Hawaii wasn't turning out as bad as he'd originally thought.

Suddenly, Danny lost concentration just as a huge wave caught the end of his board. He slipped, lost his footing and the force of the waves sent him flying, flailing about, helpless until gravity intervened, and sent him down with a sickening thud, deep into the ocean. For a moment he panicked, thrashing his arms against the force of the water. His eyes stung, his lungs burned, becoming tight and raw as he struggling to hold his breath. Then he remembered Grace. He couldn't die, not like this, not while his kid still needed him, so he focused, pushed back his fear and bit by bit fought against the current.

Danny didn't know how long he'd been under, his lungs screaming and his muscles trembling under the pressure, but as darkness edged in, he finally broke through the surface. He sputtered, choking, as the sweet fresh air forced the water out of his lungs. Exhausted, he was barely able to keep swimming as his muscles burned with the effort to simply keep moving; taking way longer than it should've done to swim the last few feet, before he collapsed boneless onto the sand. For a moment he just lay there, taking one stuttering breath after another, watching the clouds go by. It had been a close call, too close, but Danny was glad to be alive instead of feeding the fishes, vowing never to go near a surf board again.

When the trembling started, and he could barely hear through the blood roaring through his ears, Danny realised he was probably in shock, so forced himself to keep calm and take slow deep breaths. His heart was thudding, bursting out his chest, but slowly the muscle gradually returned to normal, and he could hear the waves lapping against the shore. Then something dawned on him, where was McGarrett? He didn't know how long he'd been lying there, but Super SEAL would have seen the whole freaking show, and should have been there by now. Danny struggled up on his elbows, looked around, but couldn't see his partner anywhere. In fact although every bush in this damn place looked the same, he was pretty sure this wasn't where he'd started out – so where the hell was he?

ooooOoooo

Danny was a natural, just as Steve figured he would be, but it was clearly a surprise to his partner who was struggling to keep the grin from his normally cynical expression. Hawaii hadn't been his home for many years, but Steve had always enjoyed what the Island had to offer. He loved to surf, hiking through it's wild, lush forests, and as millions of tourists who flocked there every year would testify – its natural beauty was awesome.

Yet so far Danny had failed to acknowledge anything good about the Islands. Instead he'd griped about the heat, and how the sand got everywhere – Steve still couldn't get him to ditch the tie, but hoped that maybe, just maybe, he'd managed to convince the city boy there was something here he'd actually enjoy. And he'd succeeded, until the wave hit…

Horrified, he'd stood there, rooted to the spot as he watched his friend flung high into the air then disappear in the ocean. When, after a minute there was no sign of the blonde head bobbing on the surface he'd grabbed his board and ran. His heart racing, when dive after dive into the deep blue void revealed nothing - not even a body. It had been his brilliant plan to teach his buddy how to surf, and he'd pushed it, pushed Danny, not taking 'no' for an answer, and if Danny was dead, his death would be on his hands. Steve's blood ran cold just thinking how he would deal with that, losing his best friend would be bad enough, but worse still, Gracie would be left without her father.

Steve's mind was racing, but he forced himself to focus. Danny couldn't be dead, he was too damn stubborn to give up without a fight, besides he had Grace, and a kid like that made life worth living. The only conclusion, at least the only one he was willing to accept – Danny must be alive. He racked his brains wondering where the hell he could be. The undercurrent could carry a body for miles, but if someone was fighting against it, well, Steve hoped Danny couldn't have travelled that far.

His arms were aching, as Steve fought his own battle with Mother Nature to mount his board, then rising quickly to his feet, rode the white horses until the beach came into sight. He couldn't see him anywhere, so he ran, scouring the area as he went, then his heart sank as he spotted a body lying on the sand.

The person wasn't moving, but Steve was still too far away to see if they were alive or dead, male or female – or Danny. His heart was pounding, deafening the sound of the waves as they crashed onto the shore when he saw him. The relief was palpable as Danny walked towards him, waved, then stopped at the man who was lying supine on the beach.

"Are you okay?" Steve raked a hand, sending drops of water flying from his hair, for the moment more concerned about his partner than the man lying on the ground.

Danny was already kneeling by the fallen man, but tilted his head up to meet his gaze. He looked pale, the colour completely drained from his face, and he was shivering. "I'm pretty good – for a guy who nearly drowned. But hey, I'm doing a lot better than this guy. He's still alive, but I can barely find a pulse."

Steve dropped to the ground on the other side, and after checking there was no spinal damage or obvious breaks, positioned the man into the recovery position. The guy was tall, about six feet, and had short dark hair slicked against his sweat stained face. Age wise, Steve reckoned he could be anywhere between thirty-five and forty, but the reason for his collapse was a no brainer – he'd been badly beaten.

Livid bruises littered his face and body; his tattered boxers were stained with dried blood, lots of it, and Steve reckoned it wasn't all his. A quick glance around didn't reveal any ID, but a raw band of torn skin around his neck made him wonder. Something had been there once, something important enough to be removed, question was – what had it been? There was also a ragged incision on his left arm. It was out of keeping with the rest of his injuries, but Steve knew the puzzle would have to wait until the John Doe woke up, provided of course he managed to survive.

"You got your cell?" Danny asked without looking, putting his hand out, but when nothing appeared on his palm he squinted up to see Steve shaking his head.

"Excuse me? You come running after me, not knowing what you were going to find, and you didn't bring your cell -what the hell is with you, McGarrett?" Danny glared at him, his eyes wide in disbelief. "So, while I'm very, very, glad it's not me lying here, what are you going to do now, wiseass?"

Steve felt himself go scarlet. "Sorry…you're right. I just saw you go down and…"

"Forget it," Danny interrupted, shaking his head and lowering his tone. "How far are we from the nearest road?" He asked, then glanced at his partner. "Tell you what, as your first aid is better than mine, you stay with him, while I go for help."

Danny started to scramble to his feet, when Steve put a restraining hand on his shoulder. "No – you stay right where you are. There's a beach café not far from here, so it shouldn't take me more than five minutes, ten tops, and I'll be back with the paramedics.

Strangely quiet for once, Danny nodded, accepted the suggestion without argument, and sank back onto the sand.

"So who do you reckon this guy pissed off to deserve a beating like this?" He asked.

Steve shrugged, but was wondering the same thing himself. "Don't know, but I do know we'll get to the bottom of it."

ooooOoooo

TBC

I hope you enjoyed the start and please review. I really like to know what you think, and I value the feedback.