Clive Revill: Emperor
[Original theatrical version, Darth Vader kneels to Palpatine's hologram]
Darth Vader : What is thy bidding, my master?
Emperor : There is a great disturbance in the force.
Darth Vader : I have felt it.
Emperor : We have a new enemy: Luke Skywalker.
Darth Vader : Yes, my master.
Emperor : He could destroy us.
Darth Vader : He's just a boy. Obi-Wan can no longer help him.
Emperor : The force is strong with him. The son of Skywalker does not become a Jedi.
Darth Vader : If he could be turn, he would become a powerful ally.
Emperor : Yes... Yes. He would be a great asset. Can it be done?
Darth Vader : He will join us or die, master.