You get it from the second spy you rescue, who is being held at the electrified building on Toupee Terrace. To rescue him, you will need the Laser Pen you get by rescuing the
…first rescued spy (at the docks).When you are wearing the grapple bowtie, you can shoot a line to another building or structure and the grapple line will carry you there. (You can take the bowtie on and off.) Both spies give you parts of the passcodes you will need later.(see the related questions below)Rescuing the First and Second SpiesTo rescue the first spy, you need the Chameleon Suit from Spyglass Eyewear. Go there and take an eye test, answering all of the test with the opposite symbols than what the doctor points to. Go outside to enter the upstairs room and he will give you the Chamelelon suit. Go to the docks and use the suit to get past the guards at the door on the roof. Inside, pass the dogs the same way and enter the Vault through the hole in its ceiling. The spy will give you the Laser pen.Then go to Toupee Terrace at the far right after you go out. Climb up past the electric windows and reach the barred roof opening. Use the laser pen and free the second spy. Talk to him and he will give you the grappling bowtie and more important info about the B.A.D. satellite. To rescue the third spy, use the grappling bowtie to reach the Rooftops at the Grease Monkey garage. (MORE) 
