Go back to Baldwin Avenue and use the grappling bowtie to climb the building above the Grease Monkey Garage. You will reach the Rooftops. Put on the chameleon suit and grapple left to the guarded building, then again left to the next building over, that you can safely climb up.
at a place in spy island that i do not know of.
The second antenna is across from the first where there is and agent. Shoot your bow tie across. It should hook on something. I am already done that island.
The second rescued spy (in the electrified building on Toupee Terrace) gives you the grappling bowtie, which you use to rescue the third and final missing spy.
But It!
there isn't a fourth agent.
It is the Second Building on Main Street on Spy Island on poptropica.com.
click on him
they are used for keeping the agent held prisonerThe dogs on spy island are in the dock Hideout
Click on him
On Spy Island you must rescue all three spies, in order. The first spy gives you a Laser Pen to help free the second spy. The second spy gives you a Grappling Bowtie to rescue the third spy. The third spy gives you the Ultra Vision Goggles, which can see lasers. The goggles, and a fingerprint from the Bistro agent, will let you enter the B.A.D. hideout to the right of Toupee Terrace. (see related question)
the second spy is on top of the roof in that little house thing and you go in with your camo suit.
You have to free the "first" spy, at the Docks, before you can rescue the "second" spy, who is in the attic behind the bars. The first spy will give you a Laser Pen that can cut the bars. (see related question)