The Remote Terminal at this location is located in the right parking lot of the area, but it can only be activated after completing the Asylum Assignment level. This one is a Remote Terminal for land vehicles. Note: You can use it during the Harbouring a Criminal Level Prelude, but you will only be able to use Robin's Helicopter until you complete the Asylum Assignment level.
After activating the Remote Terminal, you can find this character in the center of the area, a little to the left of the Remote Terminal. Go left to find him. In his boss fight, he will hide underground and five Mad Hatter Goons will come to attack you. Defeat them to return the Mad Hatter to dry land. When he is back on solid ground, quickly approach him and hit him to remove a heart. When you take a heart from him, he will return underground and eight Mad Hatter Goons will attack you. Defeat them and remove another heart from the Mad Hatter to return underground. Defeat ten more Mad Hatter Goons and take the last heart from the Mad Hatter to defeat him. When you remove his three hearts, you can buy him for 100,000 studs.
On the upper right side of the left parking lot, you will find a Bat Signal symbol. Use a character with a grappling hook on it and grab the handholds and grab another grappling point until you find a broken Gold Door. 40 Gold Bricks are needed to build it. When you have 40 Gold Bricks, build the Gold Door to reveal Dick Grayson. He costs 125,000 studs.
On the upper left side of the right parking lot, you will find a Joker Box. Use the Joker to open it and reveal the Red Brick of this extra. It costs 50,000 studs.
Use a flying and laser character to destroy a gold plate on the horn of the giant statue on the lower left side to reveal this Gold Brick.
Use a flying and laser character to destroy a gold plate on the horn of the giant statue on the upper left side to reveal this Gold Brick.
Use a flying and laser character to destroy a gold plate on the horn of the giant statue on the upper right side to reveal this Gold Brick.
Use a flying and laser character to destroy a gold plate on the horn of the giant statue on the lower left side to reveal this Gold Brick.
Use a laser character to destroy a golden cage on top of the building and get this Gold Brick.
In the parking lot on the right, you'll find six bouncing red fire hydrants. Destroy them quickly to get this Gold Brick.
Go to the lower left building to find a panel with Robin's Acrobat Suit. Put it on as Robin, follow the stud path, climb a pole, and use a grappling hook to reach the roof. Climb between two white and blue walls to reach the top, climb the normal wall on the left and do stick stunts to reach the roof with this Gold Brick locked in a container. Transform into a trackball, move across the platform and run to the upper left to open the container with this Gold Brick.
You'll find this Civilian in Peril trapped in a block of ice in the parking lot on the right, a little to the right of the Remote Terminal. Use a laser character to thaw the ice and save this civilian.