After you surprise the crook in MacGuffin's he drops a key. It doesn't fit the room at MacGuffin's but it does fit the back room at Good Deals next door.
*Put the toy robot next to the camera to keep the lights on.
There are no coins used on Night watch island.
You get the key for Good Deals when you surprise the robber at MacGuffin's. (He knocks you down at the Costume store.)
There is no key to MacGuffin's or its back room. The key that you do recover fits the back room at Good Deals next door.
You do not get that key during the quest. The key that is eventually dropped in MacGuffin's fits the back room at Good Deals next door.
night watch island
The "Back Door" key fits the employees-only door at Good Deals Electronics. (use the toy robot by the camera to keep the lights on)
Back Lot Island (April 2013)
The Employees Only room in Good Deals. You can use the toy robot by the camera to keep the lights on.
You don't need a key. When the dummy crashes the cart into the fountain, travel to PrintFax and look at the first copier. The MENU will bring up the last copy that was scanned.
It doesn't fit the door at MacGuffin's. Try next door at Good Deals. You can use the toy robot to keep the lights on.
The word is "frost."
The password to the scooter is "frost."