Twin Suns

ROTJ AU:
Vader reached out into the Force, eager to teach this trooper a lesson when suddenly the old him woke from his slumber and an Anakin quip slipped out of his mouth: “Have the Empire become so desperate that they’re recruiting below the height requirement?”
A wave of amusement splashed through the Force from the trooper. That signature...
The trooper took off his helmet, jerked his blonde hair back from his eyes and stared up at him. “Explains why I can’t see out of this helmet.”
Darth Vader was left utterly speechless. His son stood before him. His son was here of his own free accord.
Luke flashed a smile that warmed Vader’s heart. “I’m here to rescue you.”
 
OR:
Luke Skywalker sneaks on-board the Executor to rescue his father, Darth Vader.