Saving the second spy is not complicated, but requires timing. Go to the building on Toupee Terrace that has electrified doors and windows. Jump up to each window while the power is off. When you reach the roof, use the Laser Pen to cut open the bars. Go inside and untie the second spy. He will give you the Grapple Bowtie.
You get the "grappling bowtie" from the 2nd rescued spy (in the electrified building on Toupee Terrace). You must rescue the spies in order, because you need the devices to rescue the following spy. (see related question)
when you rescue the 2cd. spy he gives it to you
You have to rescue the three spies in order, because the first spy gives you the item to rescue the second spy, and the second spy gives you the item to rescue the third spy. The first spy is in the warehouse at the Docks, the second is in the electrified building on Toupee Terrace, and the third spy is in a greenhouse on the Rooftops above the Grease Monkey garage. (see related questions)
Rescue the first spy. He is locked in a vault...but there is a hole in the ceiling!
rescue spy trap in attic by building with zappers
Go to the electrified building on Toupee Terrace and rescue the second spy.
You need the Laser Pen. The spy in the attic is the "second spy" to rescue, because the first spy you rescue has the Laser Pen. Get the Chameleon suit from Spyglass Eyewear, and rescue the first spy on the docks. Then you can come back to the electrified building and save the second spy. (see related questions)
Director D is the Director of the "friendly" spy agency on Spy Island. He will give you the assignment to rescue the three kidnapped spies. He is in Headquarters, the large building where you arrive on the island.
You have to rescue the three spies in order, because the first spy gives you the item to rescue the second spy, and the second spy gives you the item to rescue the third spy. The first spy is at the Docks, the second in the electrified building on Toupee Terrace, and the third on the Rooftops above Balding Avenue. (see related questions)
No. You get it when you rescue the second missing spy. The first spy is at the docks and you require the Chameleon Suit. The second spy is on Toupee Terrace and you will need the Laser Pen (from the first rescued spy). The third spy is above Balding Avenue, so you will need the grappling bowtie to rescue her.
Rescue the third spy from the Rooftops above the Grease Monkey garage. You will need the Grapple Bowtie from the second spy. (see related questions)
Director D of course