Unbeknownst to the rest, Marcus programs Donald's self-driving car to speed Leo to his death, and Eddy contends with Tasha over anniversaries, wedding versus activation.
Without permission, Leo uses Donald's robot fly to secretly film Bree, but an accident unleashes a swarm of them upon the school that goes berserk, attacking the student body.
Donald vengefully enters a robot battling competition against Chase and Leo. Meanwhile Adam must date Bree's friend Caitlin to keep Caitlin quiet after witnessing Bree's bionic powers.
Heedless of Donald's warning, Chase braves the arctic to retrieve rare minerals, only to become trapped in an avalanche and rescued unexpectedly by a familiar yet unwelcome face.
In technologically upgrading Mission Creek High, Donald eagerly gives Perry a robotic version of herself to help patrol the students, which leaves Leo and Chase taking heat from the student body for it.