During missions and city exploring you will encounter citizen in peril. If you help them you will get 1 gold brick for each (there are overall 50 citizens that need help - 15 in missions and 35 in the city). In the section Map they are marked on violet spots. There are different perils on your way. E.g. you will have to eliminate enemies, freeze the water leaking from hydrant or fuse ice blocks. Remember that in missions you can help some of citizens only in free mode.
Theatrical Pursuits -in first location move to the left. There is a girl attacking by goons - eliminate them.
Harboring a Criminal - at the beginning of the mission move to the right side and help woman who is attacked by two criminals.
Arkham Asylum Antics -fly over the wall where Catwoman will fall down and attack two enemies.
Asylum Assignment - on the right side of stairs. Destroy silver gate and eliminate two enemies.
Chemical Crisis - in the burning part of factory just before location with three tanks in the floor. Use Batman's bat suit, jump up, destroy blue wall on the right and throw Batarang at all three valves.
Chemical Signature - when you get to the vehicle's roof move to the left, jump on the platform and eliminate two goons.
Unwelcome Guests - in the location with dinosaur. Citizen is on the central rock on the left side of platform with dinosaur.
Destination Metropolis -when you get to the air look at left. You will see a citizen on the mast, use magnesium to pull the mast.
Research and Development - in the first location jump on the second balcony and move to the left. Use Aquaman to clean the chemicals near citizen.
Down to Earth -during the fight with robot, there will be civil chopper running away from fighter. Shoot down the fighter.
Underground Retreat - on the junction move to the tunnel on the left, destroy black bricks and pull the handle.
The Next President - during the fight with robot get on the roof on the left side. Citizen will be hanging on blue mast, use magnesium to pull it.
Core Instability - during the chase you will see a tree on the right side, shoot to it.
Tower Defiance - during the fight with robot on the roof, fly on metal shelf on the left side and eliminate two enemies.
Heroes Unite - in the car on the left side, just break the blue pane.