Bree and Chase rush down to help the students. Suddenly, there is an explosion in the weapons storage area and Douglas is injured. Leo feels completely guilty for what he's done and decides to quit the academy and go back to Mission Creek to live with his mom. Elsewhere, Adam and Bree are disappointed when they find out time is running out on them and they decide to have one last hurrah before they die. Ryan, arrives to test Chase's invention. As Chase heads back to the ship, his jet pack malfunctions and drifts him off into space.
Giselle then mentions that, with Chase's schematics, she can give all of them super intelligence. Air Date : 1st-Jul-2015 Douglas finds out that there is a student named Kate with the Commando App. Troy awakens and double-crosses Giselle because she was planning to get rid of him. Giselle comes out, and shows them that the students are trapped in another room, including Daniel. In the mentors' quarters, Troy explains to Bree that he needs to figure out how Chase's abilities work or Giselle will fire him from the movie.
Otis pees on the phone, which short circuits it and causes Bree and Leo to stop fighting and walk away from the phone. Gao escapes and Leo shoots the hole in the dome as everyone is escaping. Donald is nearly pulled out into space, but Leo pulls him back and patches the hole. Perry wants to bring with her to the academy, but Chase and Bree refuse to have it there and tells Perry to put it back. Douglas decides to enroll Daniel at the Academy, and he makes Leo his mentor. Douglas says it must have been Krane who reprogrammed Otis to destroy Douglas after he betrayed Krane.
Leo catches Bree in the act and Bree says that she just wanted to let loose because she had some freedom. Air Date : 21st-Oct-2015 Lab Rats - Season : 4 Sebastian has secretly formed an evil rebellion to get revenge on the Lab Rats for destroying his father. While she destroys the bionic academy, Bree forces Chase to activate his Commando App by embarrassing him so he and Kate can battle. When everyone leaves, Perry sneaks the skull back to the academy. The students at the academy see them on the news and attempt to save them and the rest of the civilians still on the bridge. Air Date : 3rd-Feb-2016 Giselle reveals she dug up Marcus from Douglas' old lair and rebuilt him, piece-by-piece. Perry runs into Bree and Leo saying that something is wrong.
Leo, Bree, and Chase see this and Leo is immediately afraid saying everyone is cursed. During filming of the movie, Bree stops Troy before he can fire a blaster gun at Adam, Chase, and Leo. The family is on their way to the ceremony when the bridge begins to collapse, nearly sending the limo over the edge. The androids then surround the Lab Rats and Troy sneaks up, knocks Chase unconscious, and carries him away. Elsewhere, Adam and Douglas successfully make Davenport's limo completely indestructible.
In the end, Giselle is looking for Marcus in Douglas' old lair. With no time to fix it, the third test starts. When everyone leaves, Perry sneaks the skull back to the academy. He detects that it's someone tampering with the system back on Davenportia. Perry runs into Bree and Leo saying that something is wrong. Chase turns out to be allergic to dogs as he starts sneezing, so Douglas says that Otis has to leave, but he and Adam actually hide the dog. However, Giselle manages to escape.
Her cat is on the ground next to her. Ryan that there is a design flaw with the braking system. Leo comes out of the hydro-loop and attacks S-1, unaware that she does not have any memories of their encounter, knocking her unconscious. Meanwhile, Donald successfully convinces the others that he has the best interest for them at heart while Adam still blames Chase for everything that happened after the rebellion is over. The Lab Rats put their lives at risk when they face off against the vanished students' captors - Giselle, who has restored the evil android Marcus, now seeking revenge on the family. Chase checks out the satellite, but can't seem to find anything wrong with it.
Chase and Douglas try to find a way to save everyone before they die. On the ship, Chase vows not to speak to Adam because of his reckless actions. Taylor and Logan call Leo and ask him to help. Eventually, Leo manages to save Chase. Bob tries to understand Halloween by showing Adam his most terrifying items such as a math test, a potato with eyes, and Santa Claus, but Adam is unimpressed.
Bob tries to understand Halloween by showing Adam his most terrifying items such as a math test, a potato with eyes, and Santa Claus, but Adam is unimpressed. Air Date : 22nd-Apr-2015 When Leo is injured during a mission, Tasha rushes to the academy to take care of him. Perry says she's going to another island across from theirs, but Douglas says no because it's deserted and has been uninhabited for years. He attacks Chase and implants the Triton App in Donald. When Adam finds out how upset Bree was because she could not get her friends to come, Adam invites random strangers from the pier. Douglas uses the technology from the lie-detecting chair to tell if the mission alerts are real or not. .