Homer's Enemy/References

Cultural References

 * Martin's power plant model resembles the terraforming colony in the movie Aliens.
 * Frank Grimes himself is based on Michael Douglas' character Bill Foster from Falling Down.

Continuity

 * Lenny and Carl have Master's degrees, but Homer's degree, which he earned in "Homer Goes to College", isn't mentioned,Homer didn't complete a degree - Burns just had him take Nuclear Physics 101 to comply with the inspectors' requirement that Homer have college-level training in nuclear physics.
 * Homer shows Grimes his pictures and his grammy, which reference numerous previous episodes:
 * One picture depicts the time he toured with The Smashing Pumpkins, referencing "Homerpalooza".
 * Another shows when he went to space, which references Deep Space Homer.
 * A third shows his friendship with Gerald Ford, which references "Two Bad Neighbors".
 * The grammy he showed Frank references "Homer's Barbershop Quartet".

Goofs

 * At one point, when Sarah Wiggum is seen in the audience at the power plant model contest, unusually she isn't wearing lipstick.
 * In a far shot of the audience at the power plant model contest, the lenses of Charlie (SNPP)'s glasses are white instead of aqua.
 * Frank Grimes claims that Homer has never been fired from Springfield Nuclear Power Plant. However he was fired in "Homer's Odyssey" (for crashing his tram into a stack of barrels) and "Burns Verkaufen der Kraftwerk" (when the German workers were laying off poor-performing workers -- with Homer being the only one on the list).