"["I Believe" trailer] My name is Sam Fisher. I'm a soldier. I'm not much of a philosopher, but if you want to know what I believe, I'll tell you. I believe the greatest threats to our freedom actually start small. They begin as random events that most people don't even notice. But they grow. They multiply. They start chain reactions that threaten the entire world. Some people call that "fate". I call it "Chaos Theory". But, believing in Chaos Theory doesn't mean you have to surrender to it. That's where I come in. I find those threats before they get out of hand, and I eliminate them. Quickly, quietly, relentlessly. I take the lives of a few to protect the lives of many. I commit acts of war to preserve the greater peace. I take no joy in killing, but make no mistake; I'll do what needs to be done. Because it's my job. It's my duty. My name is Sam Fisher, and I am a Splinter Cell."

"Be more than careful, be Gandhi..."

"You're right, Doug; I wouldn't shoot an old friend."

"They're not my men colonel and they are not yours either. They are just men, husbands, fathers, sons. Same as you and I. Do they need to die for our mistakes?"

"So, besides for stopping World War Three, is there anything else I can do for you this evening?"

"Co-operate and I won't cripple you."

"You guys use some cool toys."

"Thanks, I've always found it hard to count past three."

"If I find out you're lying, I will come back for you."

"I already don't like you - don't make it worse for yourself."

"[teaser trailer] I am a soldier, I've served my country for 20 years. But if I'm captured or killed I know that nobody will come to rescue me. I won't even get a funeral. Because the nation that I protect can never admit that I exist. So my death would go unremarked, my bones would go unclaimed. I don't know if that day will come but I do know...that it must not be today! I am invisible, I am relentless. I am Sam Fisher. I am a Splinter Cell."