Lab Rats

S04E23 The Vanishing (1)

Donald and Douglas announce that they've developed a bionic upgrade for all the students, except for Leo. Unfortunately, Adam, Bree, and Chase can’t benefit from it because their systems are outdated, leaving them at a disadvantage while the others gain new powers. Meanwhile, Daniel arrives at the Academy after being caught using his bionics outside. Douglas decides to enroll him and assigns Leo as his mentor. Despite Leo's efforts to teach him, Daniel struggles to learn, prompting Leo to give him the upgrade. Soon, students, including Daniel, begin to disappear, and it’s revealed that Giselle Vickers, Douglas' former girlfriend, is behind it. In a bid for help, Daniel sends a video message back to the Island.