Uh-Oh, Bo Shuda, and Order To Engage. Drop an alien at the AC and the opponent has to choose between losing 3 force every turn or letting you free Han.
Boushh, Anakins Saber, Sorry About The Mess and Someone Who Loves You. Weaken them before you layeth the smacketh down.
For DS: S&V, Jabba, Chall Bekan, and Lyn Me. "What, all your aliens are free!?"
ETE on the AC. Obvious but still really effective.
Trap Door and Elis Helrot. Free the captive, beat the captive down, take him into custody, repeat.
Zuckuss in Mist Hunter, Come With Me, with Darth Vader and Tarkin piloting. Destiny? I don't think so. And look, S&V is still in effect.