Professor Frink unveils a vehicle powered entirely by sound waves, which goes out of control.

The rocket misses the comet and destroys the bridge.

The auto-dialer calls Professor Frink, who recognizes it as his invention and tries to retrieve it.

Bart and Lisa argue in the street before being led to Frink's basement.

Frink reveals he mastered astrology to predict the future.

Frink shows Bart and Lisa their future prom scene.

Lisa reluctantly goes to prom with Milhouse, who saved her from a fire he started.

Everyone realizes Ray is real due to a black hole.

Professor Frink diagnoses bees with bee measles.

Professor Frink reveals he cloned Homer, bringing him back to life.

Frink downloads Homer's brain into a flash drive after he runs out of clones.