Skinner introduces a firefighting demonstration that spirals into chaos as Bart stokes a fire in the gym.

Skinner hosts a fire safety demonstration that Bart disrupts with pranks.

Skinner tells Homer and Marge that Bart has ADD and proposes a new drug, Focusyn.

Skinner's office scene escalates as he shows guinea pigs responding to Focusyn in a lab.

Homer tries to get Bart to take Focusyn, and Marge persuades him by appealing to his love for her.

Bart experiences drug side effects in school and class, and his poetry recitation leads to disruption.

Bart reads a self-help book at home and writes a note of gratitude to his mother.

Homer and Marge leave Bart behind to enjoy a night out, which becomes unexpectedly risqué.

Bart is paranoid about surveillance and asks Marge to help him block a satellite.

Doctors examine Bart and decide to take him off Focusyn, but Bart refuses and eats the pills.

Bart flees the clinic and wanders the town while the police and his parents search for him.

Homer searches for Bart while Smithers and Mr. Burns make absurd preparations for war.

Bart drives a stolen tank through Springfield, wrecking buildings until the police stop him.

Bart threatens to fire missiles at the school and town until police intervene.

Police discover a satellite, and Mark McGwire appears to reveal that Major League Baseball has been spying on everyone.