Citizens in Peril are non-playable characters that are in a dangerous situation or stuck somewhere and are in need of being saved. For saving them, you are rewarded with a Gold Brick. Some characters can be helped with the starter characters, whereas others will require characters, vehicles, and gadgets, with certain abilities that are not available in the Starter Pack. Listed below are all of the citizens to find and help in each of the levels.
The Wizard of Oz is stuck in his hot-air balloon which was attacked by the tree that it is now caught in, and can't get down. In order to reach him, you must first use a character and/or gadget with the Ghost Trap Ability to trap a swarm of ghosts. Once you do this, you have to use a character or vehicle with the Laser Ability to cut open the gold LEGO basket and free the Wizard.
Hans Moleman is stuck in a pile of debris in the living room of The Simpsons' House, which is barricaded by a bunch of rainbow LEGO bricks. In order to reach him, you must use a character or vehicle with the Rainbow LEGO Objects Ability to smash the rainbow LEGO bricks that block the way to the living room. Once there you just need to break up the debris.
Clara Oswald is trapped in a capsule in the first stage of the level. To save her, you first need to use a character with Fix-It Ability to fix a computer. Once this is done, you will need to use a character with the Boomerang Ability to open the capsule and free her.
Clara Clayton is riding an out of control horse in the first stage of the level. To get her to safety, you will need to use a character or vehicle with Growth Ability to grow a gigantic carrot in order to calm down the horse.
The Adventure Core is stuck behind a cracked wall in Test Chamber 08 (a secret area which is accessible through the elevator at the end of Test Chamber 05 with the Portal Gun Ability, and after completing the Test Chambers 06 and 07) that is guarded along with an Aperture Science Switch needed to access the next test chamber by Sentry Turrets. In order to reach him, you first need to use the LocateKeystone to summon a gigantic token to clear the Sentry Turrets, then you will need to go into that area and remove the cracked wall with a character or vehicle with the Super Strength Ability.
Dana Barrett is trapped in a room on the Titanic (a secret area found after the scene with the Ecto-1. You will need to go to the left and find a Screwjitzu Switch, and upon using a character with the Spinjitzu Ability to activate the switch, you will need to go to the harbor and use characters with the Boomerang, Magic, and Master Build abilities to create a bell and ring it to make a ghost in the Titanic to appear.). To save her, you need to use a vehicle with the Time Travel Ability to travel back in time to the 1912 Titanic and use a character or vehicle with Growth Ability to grow a plant. When you return to the present, the giant plant will free Dana by crashing into the room.
The Robotron Hero is stuck in a silver LEGO brick wall surrounding the bottom left corner of the Robotron: 2084 stage of the level. To free him, you just need to use a character, vehicle, or gadget with the Silver LEGO Blowup Ability to blow up the silver wall.
The Scooby Gang (consisting of Fred, Daphne, and Velma) are stuck on top of a sealed platform in the ground of the Temple (a secret area which is accessible by using a character or vehicle with the Target Ability to shoot two targets to open the Temple door.). To save them, you simply need to use a character or vehicle with the Gyrosphere Switches Ability to raise the platform and freeing them.
Sam is stuck under a table at Bilbo Baggins' Birthday (a secret area which is accessible as soon as you get to Middle-earth by going to the left to see a bridge break. You will need to use a character with the Flying Ability to fly across the gap and enter a hole.). To save him, you will need to use a character or vehicle with the Dig Ability to unearth some LEGO bricks and you will then need to rebuild them into a lever which will be used to lift up the table to free him.
Jacob Pevsner is stuck hanging on the anchor of the Destiny's Bounty (a secret area which is accessible by going to the back of Foundation Prime, where you will need to destroy a snake and rebuild it into a Screwjitzu Switch, which needs a character with the Spinjitzu Ability to activate. You will then need to use it to create a rift to the Destiny's Bounty.). To save him, you will need to pull a handle to pull the anchor, however, you will be attacked by some Robo SWATs and the handle will be destroyed. After you defeat them, you will need to use a character with the Grapple Ability to finish pulling the anchor up, saving him.
Lorraine Baines is stuck on a giant fish at the Enchantment Under the Sea dance (a secret area which is accessible during the section where you are plugging in the cables. You will need to use a character, vehicle, or gadget with the Silver LEGO Blowup Ability to blow up a silver LEGO cage to reveal the LocateKeystone. You will need to use it to summon Homer Simpson in his Mr. Plow truck to destroy a fence.). Once you go through it, you will need to use a character with the Magic Ability to levitate and hit the fish with a stick three times to save her.
Cave Johnson (Core) is stuck in a chamber. To free him, you will need to obtain Chi from a Chi fountain near the elevator, which will need a character with the Portal Gun Ability to reach it. You will then need to use a character with the Chi Ability to activate a nearby Chi altar to free him.
Ralph Wiggum is stranded on a raft in the sea near the shore. To save him, you will need to use a character with the Atlantis Elemental Ability to summon a giant water brick-built Seahorse that will dive into the water and will return Ralph to shore.
Judoon is trapped inside of a vine-like cage in the apocalyptic version of London which will require a character o vehicle with the Vine Cut Ability to cut through to free him. You will then need to follow him over to another area and use a character with the Grapple Ability to reveal a teleporter which will bring him to safety.
The Lumberjack is stuck in a pile of dirt near a tree in the Paperboy stage of the level (a secret area which is accessible on the roof of a certain building near the end. You will need to use a vehicle with the Flight Dock Ability to start a whirlwind. You will then need to go up the whirlwind.) To save him, you will need to use a character with the Dig Ability to unearth some LEGO bricks and rebuild them into a giant axe to chop down the tree.
Benji Dunn is strapped to the side of a giant bomb. To save him, you will need to go to the right side of the CIA Headquarters and use a character or vehicle with the Drill Ability to drill into a wall to reveal an IMF Disguise Scanner. You will then need to use a character with the Scan Disguise Ability to disguise as a security guard to disable the lasers. You will then need to use a character with the Magic Ability to send a pair of pliers to free him.
Cinnamon Bun is trapped inside an empty subway train near the Lich boss battle. To save him, you will need to use a character with the Raven Portals Ability to pass through a wall into the subway train. You will then need to open the train doors to free him.
Big the Cat is sinking in a giant vat of coffee in the Breakfast Kingdom (a secret area which is accessible during the Labyrinth Zone section. You will need to go the area where you will find the ScaleKeystone activator. Activate the Keystone and stand on the moving platform which leads to the surface where the tunnel on your left will be. Shrink down and travel through the tunnel to reach another area with gold LEGO objects. You will need to use a character or vehicle with the Laser Ability to destroy them and rebuild a portal to the secret area.) When inside, you will need to use characters with the Technology Ability to save him from the vat of coffee.
Rosalita is trapped inside a small cave, with her hand stuck through the wall. To save her, you will need to use a character with the Magic Ability to move a giant skull into a certain place where upon being placed, will free her.
Paul Feig is trapped inside a chest in the room where Gertrude Aldridge is confronted. To save him, you will need to destroy a coat rack nearby to obtain a hook and build it on the chest and use a character with the Grapple Ability to pull him out of the chest.
Paul Feig is stuck inside an excursion tunnel in the Aperture Science (a secret area which is accessible during the battle with Rowan North with the Portal Gun Ability). To save him, you will need a character or a vehicle with the Flying ability and press the button.
Menial Task Mike is stuck in a lonely floating cube in the background. To save him, you will need to use characters with the Relic Detector and the Boomerang abilities to detect a Batarang Switch and use it.
When Ralph Wiggum is rescued, it says "Ralph Wiggum Rescued? That's Unpossible". This is likely a reference to what Ralph himself said when Principal Skinner told him that he was failing English in The Simpsons episode "Lisa on Ice", which was "Me fail English? That's unpossible!".