Star Wars: The Original Radio Drama, Episode 11, "The Jedi Nexus"

The Jedi Nexus

C-3PO and R2-D2 talk their way out of Imperial capture and try to find a safe place to plug into the Death Star and avert certain doom for Luke and the others. Meanwhile, just as Ben Kenobi has sensed his presence, Darth Vader has sensed Ben’s - and sets out to meet him face-to-face. Luke, Han, Leia and Chewie manage to escape death in the trash compactor, but immediately encounter stormtroopers while they try to return to the Falcon. What they don’t know is that a duel looms ahead which will rob Luke of his mentor, but give him a chance to escape with Leia (x).