Use the key to override the security curfew. The Watch Tower then automatically shutters for a couple of moments, and all of the prisoners—most of which are Alpha Series—are released. Summon Eleanor and a pair of Elite Security Bots while you are waiting for the doors to reopen, and have your Incinerate! and Armor-Piercing Rounds on hand.
Fight your way past the Alpha Series down the stairs from the Watch Tower, then back through the Laundry Room and Cafeteria en route to the Docking Platform. Repair the Elite Security Bots along the way to keep them healthy. With these Bots, and Eleanor’s help, you should have no problem making it back to the Docking Platform.