: Morty uses a horse breeding mount at Beth's equine hospital for personal gratification.
: The experiment goes wrong, mutating Morty's sperm into giant, man-eating monsters that threaten the entire United States. Watch Rick and Morty S05E04 WEBRip x264-ION10 1
: To lure the sperm away, the President uses an enlarged egg harvested from Summer . Despite the military's best efforts, a lone sperm named "Sticky" fertilizes the egg, leading to the creation of a "giant incest baby" that is eventually launched into space. : Morty uses a horse breeding mount at
: Rick unknowingly uses the resulting "material"—thinking it is horse semen—to create a bioweapon to defeat an underground race of cannibalistic horse people known as the CHUDs . Despite the military's best efforts, a lone sperm
The episode's title is a parody of the 1996 film Independence Day . The plot follows a disastrous chain of events triggered by Morty's actions: