On the day of a coconut festival, Taylor returns from a trip only to find the entire festival's missing. The friends work together to figure out what's happened, and try to return everyone safely.
The friends receive a message and discover echo caves where they're haunted by their voices. Inside is a unique water formation that will help them communicate with another dimension.
The teens find Uncle Charlie's cassette tape about seeking a crystal in a Hidden Crypt - but the tape gets damaged before they hear the end. The group find the crypt, with its many challenging traps.
The gang search for a witch's amulet that can lift the veil between worlds. But they don't expect the witch to follow them home and trap them in Lila's house. Lila worries they'll miss the Solstice.
Overwhelmed, Lila wishes for a simple life in front of a painting - only to get stuck inside it. The others find a strange boy in her place, whom they must convince to return to the painting.
On Rock Island Challenge day, Meesha's competitive cousin visits and signs up to race against her. Even worse, Meesha and Ellis get stuck together.
Lila is very sad on her own birthday, prompting Ellis to reveal his all-new AI creation to cheer her up.
Lila wakes up on the edge of a cliff; worried about her extreme sleepwalking, Meesha follows Lila's latest sleeping expedition.
Lila's keen to impress in her interview for Institute Teen Ambassador, then develops mind control powers and keeps accidentally causing chaos.
When the crew visits a contamination zone and finds a substance, they think it has incredible power and want to test its capacity to unlock a doorway to the other side.
When Ellis wakes up with split personalities, his friends must wrangle his different sides to break into the Institute and retrieve something important he left behind.
Nori's excited to take April Shon on a possible date but might have to cancel when he becomes electric -- those aren't the kind of sparks he wants between them.
When a mysterious woman arrives from the mainland asking to speak with Taylor, the crew must use their instincts to protect each other and the Bermuda Queen.
The day of Meesha's students' karate competition, Nori tries an experiment and accidentally shrinks her; everyone rallies to get Meesha back to normal.
The crew finds an ally crystallized in her home, but when they realize it's contagious, they're forced to cross the island for an ingredient to cure it.
Nori feels guilty about lying to Silas about the island's mysteries; Silas returns from a shipwreck dive and gets trapped inside a mirror.
At the mine, workers see a ghostly hand coming out of the rock; the crew investigates, piecing together sightings from around the island to find a pattern.
Emily and Sunny ingest a sap that makes them act like their seven-year-old selves; Ellis tries to protect Emily from embarrassing herself at work.
With the island's growing environmental instability, the teens need to open a portal to restore balance.
As the island speeds towards environmental collapse, the teens need to fix things fast by executing the plan to end all plans -- an elaborate heist.