Disclaimer: First of all I do not own Harry Potter. It is owned by J.K. Rowling. The characters in Harry Potter are also the property of J.K.R. I am just manipulating these characters and the story.

Chapter-2 'THE TIME TRAVEL THEORY'

Chris seeing Harry's shocked face spoke," Harry I know that meddling with time is very dangerous…hell it is the most dangerous thing. But it is the only thing I found that is somewhat helpful."

Harry knew what it is like to travel through time. He had travelled through time to save his Godfather Sirius Black with Hermione. Thinking about his godfather and girl he loved bring the painful memories to resurface and Harry felt himself falling in the 'Guilt Pit'. Chris noticing Harry's facial expression knew what was going inside Harry's mind quickly decided to pull him out funk.

"Harry Time Travel allows the person to go-", but he was cut off by the painful voice of Harry.

"I will see her again."Harry spoke while looking at the nearest wall with painful expression. Then he turned to look at Chris and smoke in emotional voice," I will be able to see her again, right Chris? I will be able to meet her once again. Please Chris, tell me it is possible. "

"Yes Harry, it is possible" Chris replied afraid that Harry might try to do something foolish in order to see Hermione again. This was the thing that Chris feared the most. He knew will be very impatient to travel back in time and would neglect the consequences of the whole thing. That's why he was reluctant to tell Harry at first.

"So let's do it then." Harry said while keeping his emotions under control. He was ready to whatever is needed to be done in order to see Hermione once again.

Chris seeing Harry's determined face said," Harry, it is not easy to travel back in time. We have to be very sure what we are going to do. It is very dangerous task to do and we need to fully understand the basic concept before thinking further."

Harry replied in much calmer tone than earlier," Chris, you know it too well that we need to do this. And as I promised you earlier I won't do anything without your consent. So let's begin our work."

Chris seeing Harry's determined face decided to tell him about his finding. He pulled out a black file from his inner pocket of coat and set it on the table that harry conjured with a simple hand wave. He opened the file and showed Harry the notes on Time Travel and started explaining Harry about the theory in his lecture tone," Alright Harry, first you need to understand the basic theory behind the whole process of travelling in time. First we start from………………"

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Harry and Chris worked hard on their project to make travel back in time. Chris explained what he was able to understand from the book he read in library that Albert Einstein, a well known scientist gave the theory about Time Travel. He gave the Theory of Relativity generally refers specifically to two theories, that are Special Relativity and General Relativity. From these theories the Time Travel theory can be explained. But to explain the real Time Travel theory many more concepts like laws of physics, nature of time, space, universe, etc are required to understand. This was what Chris was telling Harry for last one hour.

"Harry, you and Hermione travelled back in time in you third year. This is an example of 'Predestined Paradox'."Chris told Harry in a frustrated tone. He was telling him about different types of Paradoxes. But Harry didn't seem to understand them very well.

"But what the hell is this 'pre-dressed paradox'." Harry didn't understand what does it matter with different paradoxes as in every case time and things are altered.

Chris once again replied," It is not 'pre-dressed paradox' it is 'Predestined Paradox'. It exists when a time traveler is caught in a loop of events that "predestines" or "predates" them to travel back in time. Because of the possibility of influencing the past while time traveling, one way of explaining why history does not change is by saying that whatever has happened must happen. A time traveler attempting to alter the past in this model, intentionally or not, would only be fulfilling their role in creating history as we know it, not changing it. Or that the time-traveler's personal knowledge of history already includes their future travels to their own experience of the past."

Seeing Harry confused face he sighed and replied in tired tone," In Layman's terms, it means this: the time traveler is in the past, which means they were in the past before. Therefore, their presence is vital to the future, and they do something that causes the future to occur in the same way that their knowledge of the future has already happened. It is very closely related to the ontological paradox and usually occurs at the same time."

"But how I and Hermione were already in the past as we traveled time on that day?"Harry asked still confused.

Chris wants to shout and hit his head on the table. But he forced himself to reply.

"You were saved from the dementors by a stag patronus. At that time, you thought it was your father who saved you as your father's Animagus form is a stag. After traveling back in time, you realized you were the one who produced the patronus- after watching yourself being attacked and seeing that no one had produced the stag patronus- you yourself casts the spell, producing the stag patronus you had seen earlier. Similarly, earlier you and your friends were alerted to the presence of the Minister of Magic when a rock hits you in the head; but after traveling back in time, Hermione recognizes the same rock and throws it at you herself. Note that, had this rock not been thrown by her in the first place, she wouldn't have recognized it later on, and wouldn't have known to throw it." Chris finished praying that Harry get the meaning this time.

"Oh! So that's what it means, huh? Why didn't you say that earlier?"Harry replied in a very casual tone.

Chris was mentally very tired to snap at him that 'That's what he was telling him from last one hour'. So he just nodded his head to Harry.

"So tell me about the other paradox." Harry said to Chris after seeing him nod.

Chris feeling little tired after explaining too much yawned and merely replied," No Harry, I'll tell you about it tomorrow. I am really very tired now. I can't keep my eyes open"

Harry noticing the tiredness of Chris looked at his watch and saw it was half past one in the morning. He decided to take a nap but he knew he won't be able to sleep due to nightmares. He looked back towards Chris noticed that he was already fast asleep in his chair. He carefully levitated him from the chair and gently laid him down on the bed. Then he turned off the lamp and carefully tiptoed from the room. He knew better not to wake Chris when he is sound sleep as he can be quite nasty if he woke up. He remembered the time Chris woke at early hour due to Harry's noise of shoes and Chris woke with the start and started cursing like a drunken sailor and thrown one spell at Harry. Harry shuddered at the memory and made a mental note not to disturb Chris' beauty sleep.

Harry entered his own room and changed his clothes. He lay down on his bed and stared at the ceiling thinking about nothing in particular. He just keeps staring for a very long time and after an hour or so his eyelids began to shut. He tried to stay awake but eventually fell asleep.

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Sorry Chapter is bit short. I was suffering from high fever and got very little time to write. But I hope that I can post longer chapters in the future (if my mom allows that is).

Well I hope you enjoyed this Chapter.

Please! Please! Please! Review!

I'll update soon so till then.