How do you save the third agent on spy island?

Answer 1

Where is the Third Spy

She is in a greenhouse at the top of the tall building on Balding Avenue. Use the grappling bowtie to reach the rooftops, go left past the guarded building, then up the red building. From there you can grapple back to the laser-protected antenna. Enter the roof vent.

To save this Spy

Go to the cherry bomb tree on the bottom left, click on the cherry, and push it to the first trampoline flower. It will be thrown up to another level. Jump on the second trampoline flower, and you will be with the cherry bomb. Push the cherry bomb to the edge and it will fall onto the the second trampoline flower. Then you will push the cherry bomb to the lock on the cage door holding the third spy. Step back and it will blow.

You have about 40 seconds before the cherry bomb blows after you click on it. If you fail, you can go get a new cherry bomb, which will grow after the first one blows up.

Answer 2

To reach the third spy, you need the Grappling Bowtie from the second rescued spy (who you reach with the Laser Pen from the first rscued spy).

To get to the Third Spy

On Balding Avenue, use your grapple bowtie to go up the building to the right of the Grease Monkey garage. At the top, you can enter the "Rooftops". From there, you put on your Chameleon Suit and grapple left to the next building, which is guarded and has lasers to keep you from going up. Instead, go farther left to the red building, and climb that one. At the top, you can grapple right to get to the tower. Enter the tube to rescue the third spy from the Greenhouse.

To rescue the Third Spy

Take off the Grappling Bowtie. Go past the cage where the Spy is being held, and to the bottom right of the greenhouse. Find the Cherry Bomb tree and get a Cherry Bomb. You must act quickly because the bomb will explode in about 40 seconds. Push it left onto the Trampoline Plant, which will throw it up to the right. Avoid the carnivorous plants and climb up to where it landed. Push it left again, onto the second Trampoline Plant, which will throw it up and left, near the cage. Jump up and push it closer before it explodes.

The Ultra Vision Goggles

The freed third spy gives you the Ultra Vision Goggles, which can see lasers. Once you have obtained the Fingerprint from the Bistro B.A.D. agent, you can enter the B.A.D. control station to the right of Toupee Terrace.