The third spy has it
there is no key for the 3rd spy
There is no greenhouse on Spy Island.
By rescuing the third spy.
go to B.A.D. Headquaters.
Infiltrate the enemy headquarters: the B.A.D. control center.
You have to find the third agent. She will give you the goggles and the last password clue.
The tallest building on Balding Avenue. It is where the third spy is held. (see related question)
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)
Spy Island is island #6. After Spy Island is Nabooti Island #7
The third passcode (from the 3rd rescued spy) is "removal." The codes have to be entered separately on the transporter computer: laser (enter) hair (enter) removal (enter).
You can get the disguise eyeglasses at Spyglass Eyewear. But the "spy goggles" that see lasers are not available there. You will have to rescue the Third Spy in order to get the goggles. (see related question)