A/N: This is a crossover with Star Trek, The Original Series; however, since it leans more heavily towards Hogan's Heroes, I decided to post it on the main page, to make it easier for those who are interested in reading it to follow the updates. This story is not meant to be 100% scientifically or historically accurate, but I did attempt to write it in the spirit of the original television shows, and hopefully everything will make sense. If you decide to read it, I hope you enjoy it!

Disclaimer: I do not own any of the Hogan's Heroes or Star Trek characters; I'm just borrowing them to tell a story.

Chapter One: A New Mission

May 23, 1944

Sergeant Carter sat outside Barracks Two, attempting to soak up the last few remaining rays of light before the sun dipped below the tops of the trees that ringed the perimeter of the camp and stretched into the forest beyond. He'd been a POW at Stalag 13 now for well over a year, and, as much as he cared about the friends he'd made here – the ones he lived with and worked with every day – sometimes he wished he was back home, watching the sunset from the porch of the house he grew up in.

Corporal Newkirk came out of the barracks just then and, lighting a cigarette, leaned back against the wall, taking a big drag and exhaling the smoke slowly into the cooling air. Without glancing at the American, he uttered, "Watchin' the sunset again, are we, Andrew?"

"Yeah," Carter answered wistfully. "It was always my favorite part of the day back home. We'd sit on the porch and relax for a while, drinking lemonade and talking about all kinds of things." He paused and let out a soft chuckle. "Once, when my uncle came to visit, he told us about the time he went to feed the cows, and when he got done, he couldn't find his watch. Well, he looked everywhere, but it was gone. So a few days later he was cleaning the barn, and guess what he found sticking out of a pile of manure?" He turned his head to look at Newkirk, who was staring at him with an incredulous look.

"Blimey, I 'ad to ask, didn't I?" Newkirk mumbled and shook his head.

"It was his watch!" Carter exclaimed, grinning wide.

Newkirk frowned. "I got it, Carter," he replied, sounding somewhat annoyed.

"See, the cow accidentally ate it, so it took a few days for it to come out the other end – "

"I said, I got it, already! 'Ave you gone deaf?"

Carter's face fell. "Oh, yeah, I guess you did," he replied dejectedly; then turned his attention back to the setting sun.

Newkirk heaved a sigh and dropped his cigarette butt on the ground; squashing it under his boot. "Look, Andrew, I…" His voice trailed off as he noticed a car driving into camp. It looked like General Burkhalter's car, and when it reached the front of the Kommandantur, it stopped.

Carter, who had been watching it, too, quickly stood up from the bench he'd been sitting on. "We'd better go tell the colonel," he said, and headed for the barracks door.

"Right behind you, mate," Newkirk replied.

The two men hurried into the barracks, glancing quickly around the large room. Corporal LeBeau was walking towards his bunk, and Newkirk called out to him, "Louis, where's Colonel Hogan?"

LeBeau jerked his thumb in the direction of the door leading to a small room on the side of the barracks. "He's in his office," he said, then his brow furrowed, "Why?"

"General Burkhalter's car just showed up," Carter answered, "We figured the colonel would want to listen in."

The false-bottom bunk banged open just then, and Sergeant Kinch climbed out. He saw the three men look in his direction, and asked, "What's up?"

"Burkhalter's here," LeBeau told him.

Kinch nodded. "Guess we better find out what he wants."

The four of them walked over to Hogan's door, and Newkirk rapped twice. When he heard Hogan's muffled reply to enter, he opened the door. "Colonel," he said as he entered the room, "Burkhalter's 'ere."

Hogan's brow furrowed. "Burkhalter? Isn't it a little late for him to be stopping by?"

"That's what we thought, sir," Carter said.

Kinch walked over and, snagging the coffee pot receiver, placed it on the desk and plugged it in. After he turned it on, the men crowded around to listen to the conversation going on in Klink's office.

Klink was sitting behind his desk, trying to sift through the mountain of paperwork that had accumulated during the course of the day, when there was a knock on the door to his office. "Come in," he called out absently, while searching in his top drawer for a pen that worked.

The door opened, and General Burkhalter walked in. Klink looked up in surprise and quickly shut the drawer, almost slamming his finger in it. He jumped to his feet and said nervously, "Ah, General Burkhalter, what a pleasant surprise! To what do I owe the pleasure of your visit?"

Burkhalter scowled. "Klink! This is not a social visit! I am here to discuss a matter of security with you."

"Security? But, General Burkhalter, I can assure you that the camp is quite secure. You know we've never had an escape from – "

"Yes, yes, I know," Burkhalter interrupted. "This is not about the camp. I need some of your guards to work at a new facility that was built near here," he leaned in slightly before continuing, "One of our scientists, Dr. Werner, is working on a top secret discovery."

"Oh? What is it?" Klink asked in a hushed voice.

Burkhalter frowned. "How would I know? I told you, it's top secret!"

"Yes, of course, Herr General," Klink muttered nervously. "I just thought that…well, you being such a high ranking General, surely they would have told you something."

"Even if they had, I wouldn't share it with you, Klink," Burkhalter snorted. "But I will tell you one thing; it's big…very big. Whatever it is, it could win the war for us."

"Really?" Klink's eyes grew wide. "How wonderful!"

"Yes, it is," Burkhalter remarked, a grin appearing on his face; then it quickly faded. "Klink, you are not to discuss this with anyone; do I make myself clear?"

"Oh, yes, sir, General Burkhalter, very clear!" Klink replied, nodding vigorously.

"Good." And with that, Burkhalter turned and left the office.

Hogan and his men listened as Burkhalter left Klink's office. Kinch unplugged the coffee pot and, as he was putting it away, uttered, "I take it we're gonna have to find out what that scientist is working on, right, Colonel?"

Hogan nodded. He glanced among his men and said, "Not only that, but we also need to find out where he's working."

"Well, maybe Schultz will get assigned there, and he can tell us where it is," LeBeau suggested.

"That would be a bit o' good luck, wouldn't it?" Newkirk added, putting a cigarette in his mouth and lighting it.

"Yes, that would be," Hogan muttered, more to himself, "And we're due for some good luck, aren't we?" He turned to his radioman. "Kinch, get on the horn to London; see if they know anything about Dr. Werner. I'll work on Klink; maybe I can talk him into sending Schultz to help guard the doctor's lab."

"Yes, sir," Kinch replied. He opened the door to leave, when he saw Sergeant Schultz entering the barracks through the outside door.

"Roll call! Raus, raus! Everybody outside!" Schultz bellowed.

Hogan and his men filed out of the colonel's office. Hogan walked up to the big German guard and said, "Hey, Schultz, it's not time for roll call."

"It's a surprise roll call," Schultz answered, turning his head toward the senior POW, "The big shot wants everybody outside right away!" Then he swept his gaze around the room and started hollering again. "Raus! Everybody, outside – right now!"

"All right, all right, we're rausin'," Newkirk replied, wincing, "Don't get your knickers in a twist, Schultzie!"

The men began to file out of the barracks, grumbling and cursing under their breath. Hogan, last man out, sidled up to Kinch and said quietly, "Looks like we'll have to wait until after roll call." Then he gestured for Kinch to exit the barracks, and followed after.

Many, many years in the future:

Captain Kirk sat in his command chair on the bridge of the U.S.S. Enterprise, staring calmly at the screen in front of him. They had just completed a difficult mission, and were on their way to the nearest star base for a much-needed break. Everyone seemed eager to get there, even Mr. Spock; although, no one would have been able to tell, except for perhaps Kirk – he could read the Vulcan better than most.

The bridge was quiet; everyone lost in their thoughts, when suddenly there was a beep at Lieutenant Uhura's communications station. She pressed a button and listened intently, then turned to Kirk.

"There's a message for you, sir…" Her voice trailed off as she looked back at her console and frowned. "That's strange; it appears to be coming from Earth."

"Why is that strange, Lieutenant?" Kirk asked, "We get transmissions from Earth all the time."

"Yes, sir," Uhura replied, "But this one isn't coming from Starfleet Command, it appears to be coming from…the South Pole!"

Kirk glanced at Spock, who immediately looked into his monitor. "The Lieutenant is correct, Captain," he replied after a few moments, "The transmission is indeed coming from Earth, near the South Pole."

Kirk reached up and stroked his chin thoughtfully. "That is strange. We have no bases there anymore; certainly no communication equipment set up…." He dropped his hand and set his eyes forward. "Put it on screen, Lieutenant."

There was a brief beeping noise as the screen changed from the star field they'd been watching, to the message. Then, as the image became clear, several gasps were heard around the bridge…it was Captain Kirk!

The Kirk on the screen smiled and said, "Greetings, Enterprise, this is Captain Kirk speaking. I have a very important mission for you; one that will mean the difference between mankind's continued existence, or the complete destruction of planet Earth."

Kirk whirled in his chair. "Mr. Spock, what is going on?"

"Analyzing transmission now," Spock absently replied as he gazed into his monitor. "It appears to be genuine," he murmured, his eyes still glued to the monitor. "Voice pattern matches, facial recognition…" He straightened up and looked at Kirk. "The image on the screen is you, Captain."

"What? How is that possible?" Kirk turned back and gazed at the screen.

"I presume by now Mr. Spock has told you that I am Captain Kirk," the image spoke up; a slight grin on his face. "I'm you, Captain…but, from the near future."

Kirk was becoming annoyed by now. "All right, if you're me, then prove it!" he exclaimed at the screen.

"You already have your proof," the image stated matter-of-factly, and Kirk glanced at Spock. "Can he hear me?"

"No, I can't hear you," came the reply from the screen, "I'm just responding to what I said when I was watching this transmission for the first time."

"Fascinating," Spock murmured.

"You have no idea, Mr. Spock," the image said.

Spock's eyebrows shot up with surprise.

"Now, as to the mission I mentioned, and the reason for this message," the image continued, "Back in the 1940's on Earth, during World War II, there was a German scientist by the name of Werner, who accidentally discovered antimatter." The image paused, and his face grew serious. "I don't think I have to tell you what could happen if his discovery fell into the wrong hands."

There was silence on the bridge for a moment; everyone knew what he meant.

"In any case, the Allies found out about him," the Kirk image said, "Because there was a group of Allied prisoners working out of a POW camp in Germany, who were involved in a sabotage/espionage operation."

"He's right, sir," Sulu piped up, "I remember reading about them in our history books. I think they worked out of a camp called, Stalag 13."

Kirk opened his mouth to reply, but the image beat him to it. "You are correct, Mr. Sulu," he said, smiling slightly; then grew serious again. "The Allied prisoners informed their headquarters in London about Dr. Werner, and they were ordered to destroy both the doctor and the lab…with explosives."

"But that vould destroy the whole planet!" Chekov exclaimed.

"Exactly, Mr. Chekov," the image replied. "That's why you need to go back in time, and stop them."

"What?" Kirk exclaimed, "Go back in time, just like that?"

"We've done it before, Captain," Spock said.

"Yes, Spock, but it's risky – "

"If you don't," the image said, "You will no longer exist. Earth, as we know it, will be gone."

Another moment of silence passed across the bridge. At last Kirk spoke up. "If we do this; if we go back in time, how will we find Dr. Werner?"

The image on the screen flashed a brief smile. "You must go back to no later than May 23rd, 1944, and contact the group of Allied prisoners at Stalag 13. Their Commanding Officer's name is Colonel Hogan. They will help you find the doctor, and then you will be able to take care of both him, and the antimatter." The image grew serious once again. "Our future depends on your success. Good luck." Suddenly the image faded and the screen went dark.

Kirk glanced around at his crew; his gaze coming to rest on his first officer. "What is your opinion, Mr. Spock?" he asked him.

Spock raised an eyebrow. "Since the transmission appears to be genuine, I believe we have no choice," he answered.

Kirk sighed. "I knew you were going to say that." He turned to his navigator. "Mr. Chekov, set course for Earth."

"Aye, Keptain."

"Mr. Sulu, warp factor six."

"Aye, aye, sir."

The star field was brought back up on the screen, and they headed for Earth.