The character of Dr.Weir transforms throughout the movie.  His metamorphosis can be summarized and organized by four stages:


1: Brilliant astrophysicist

Starck : "How?"
Weir : "It's...it's difficult. It's all math."
Miller : "Try us, doctor."
Weir : "Well, using Laymen's terms. Use retaining magnetic fields to focus a narrow beam of gravitons to turn fold-space time consistents with Weyl tensors dynamics until the space culvature become infinately large and you produce a singularity. Now, the singularity..."
Miller : "Laymen's terms."
Cooper : "Well, fuck Laymen's terms. Do you speak English?"

Weir : "What about my ship, you cant' just leave her!"
Miller : "I have no intention of leaving her, Dr Weir. I will take the Lewis and Clark to a safe distance and launch tac missles at the Event Horizon until I'm satisfied that she's vaporized. Forget this ship!"
Weir : "No you dont..."
Miller : "."
Miller : ""
Weir : "You can't leave. She won't let you."
Miller : "You just get your gears and get back to the Lewis and Clark, doctor. You'll find yourself walking home."
Weir : "I am home..."
2: Suspicious outcast


3.  Cruel mastermind

Miller : "Oh...my...god...What happened to your eyes?"
Weir : "Where we're going, we won't need eyes to see.."
Miller : "What are you talking about?"
Weir : "I created the Event Horizon to reach the stars. But she had gone much, much, further than that. She tore a hole in our universe, a gateway to a new dimension. A dimension of pure chaoes, pure evil. When she crossed over, she was a ship. But when she came back, she was...alive. Look at her, Miller, isn't she beautiful?"
Miller : "Your beautiful ship killed its crew, doctor."
Weir : "Well, now she has another crew. She has us."

Miller : "Weir?"
Weir : "[laughs] The ship brought me back. I told you she won't l leave. She won't let anyone leave. Did you really think you could destroy her, Miller? She defied space and time. She's been to a place you couldn't possibly imagine. And now, it is time to go back."
Miller : "I know, to hell."
Weir : "You know nothing. Hell is only a word. The reality is much, much, worse."
4.  Invincible hell-raiser


thanx to Trinity and her screenshots for this picture!