Star Wars Episode III: Revenge of the Sith2005

[Anakin stops Mace Windu from hurting the Chancellor, severing Windu's hand. Palpatine drops his act and again strikes Windu with force-lightning]

Chancellor Palpatine/Darth Sidious:
[Triumphantly] POWER! UNLIMITED... POWER! [sends Windu flying out the window to his death]

Anakin Skywalker:
[Horrified] What have I done...?!

Sidious:
You're fulfilling your destiny, Anakin. Become my apprentice. Learn to use the Dark Side of the Force.

Anakin:
[exhausted] ... I will do whatever you ask.

Sidious:
Good!

Anakin:
Just help me save Padmé's life. I can't live without her.

Sidious:
To cheat death is the power only one has achieved, but if we work together...I know we can discover the secret.

Anakin:
I pledge myself...to your teachings.

Sidious:
Good. Good. ... The Force is strong with you. A powerful Sith, you will become. Henceforth, you shall be known as Darth... Vader.

Darth Vader:
Thank you, my master.

Sidious:
Rise.