Conversation between the Sandpeople when they spot Luke's speeder in ANH... Seriously, there are many. Really hard to choose. OT : - Luke, Han and Ben in the Falcon, from the moment they come out of lightspeed till they are sucked by the Death Star, in ANH. Like the tension of that scene. - Vader and Luke conversation on Endor before flying to the Death Star in ROTJ. Very moving scene. PT : - Palpatine and the Queen before addressing the Senate in TPM ("There is no civility, only politics..."). Great dialog and Palpatine's manipulations at its best. - Obi-Wan and Anakin conversation after the later has been denied the rank of master in ROTS ("That's why you must help us..."). Awesome scene with good tension.