Hercules (Kevin Sorbo), back in human -- or rather demigod -- form, is escorting Katherine, a pig he met during his "Porkules" adventure, home to her farm. Unbeknownst to him, Ares (Kevin Smith) is plotting revenge against Iolaus (Michael Hurst) for turning Discord into a chicken using Artemis' bow. Though Ares is enjoying Discord's humiliation and ruffled feathers, the god of war is not above punishing Iolaus and Autolycus (Bruce Campbell) for daring to interfere in the affairs of immortals. He and his fowl sidekick find Iolaus and Autolycus already bickering, but they truly learn to hate one another when Ares shackles them together using gold chains forged by Hephaestus with no lock for the King of Thieves to pick. And just to make things interesting, Ares also takes away their clothing.
Covering themselves with leaves and vines, the pair set off to find Hercules, who has discovered that he can still understand pig-language. Katherine, who has become quite taken with Hercules, both as a pig and as a man, tells Hercules of her fervent wish to become a human. Hercules encourages Katherine to be happy with who she is, but when Aphrodite (Alexandra Tydings) arrives to pick up Artemis' bow, she realizes that the pig's heart is breaking even if Hercules is blind to it. Drawing back the bow, she shoots Katherine and turns her into a woman (Alexandra Tydings) in her own image -- looking almost as good, but not quite.
Meanwhile, Iolaus and Autolycus, who now sport stolen potato sacks, are bumbling and fighting their way to Katherine's farm when they tumble down a steep hill and land in a stagnant pool of mud. Filthy, scratched and covered with rotting twigs and leaves, they approach a young girl (Hannah Collins) to ask for directions and she runs away screaming. It's not until they are attacked by an angry mob with pitchforks who mistake them for a monster that they recognize another one of Ares' tricks: no one can understand anything they're saying. Their words come out only as scary, monster-like noises. They manage to escape the frightened villagers, but further flight is impeded by Autolycus having eaten sleep-inducing goosenberries and passing out. Iolaus tries to lug his companion's dead weight across a log over a deep chasm, but Ares has more fun in store. He gives the pair unwieldy giant feet, with huge ears and vivid tufts of orange hair to match. Just when Iolaus and Autolycus finally get their balance, Ares takes away the log, sending them plunging into the river.
Katherine is enjoying life as a human and can't wait to try new things, although she gets some strange looks when she strips off all her clothes to roll in the mud and slurps her food straight from the bowl. But when she runs into Sadie, a horse she used to know, and a group of her pig cousins can no longer recognize her, Katherine begins to think about her old life. Hercules reminds her of how much she loves her family and how she will have to leave them if she remains human.
Again covered with muck, Iolaus and Autolycus have been caught by the mob, who mistake them for the Big-footed Two-headed Forest People of legend. They are saved from certain death by Barnabus (Michael Saccente), who buys them to display in his Greatest Show In Greece. Fortunately, Hercules attends the circus and recognizes his two friends. He breaks Hephaestus' chains and Iolaus and Autolycus, now restored to normal, gladly go their separate ways. But as Autolycus is leaving town, he is attacked. Stunned and shaken, he goes to warn Iolaus of the new danger: Discord is now a giant chicken. With Discord on the rampage, Iolaus devises a plan and manages to get her to swallow a huge dose of goosenberries. Discord's gigantic body begins to topple toward Autolycus, but at the last moment, she turns back into a regular-sized bird and lies quietly, snoozing. Ares appears laughing to collect his chicken, proclaiming that he hasn't had this much fun in a long time, and Iolaus and Autolycus part as friends. Hercules returns Katherine to her farm and they share a tender goodbye before Aphrodite turns her back into a pig. Happy and relieved, Hercules departs knowing that Katherine is thrilled to be back with her family.
Starring: Kevin Sorbo (Hercules), Michael Hurst (Iolaus)
Guest Starring: Alexandra Tydings (Aphrodite & Katherine), Kevin Smith (Ares), Bruce Campbell (Autolycus), Michael Saccente (Barnabus), Steve Wright (Head Peasant), Hannah Collins (Little Girl), Colin Francis (Wolfgang Puke), Zo Hartley (Mother), Tony Bishop (Field Hand), Christine Bartlett (Diner), Meighan Desmond (Discord/Chicken)
Written by Adam Armus & Nora Kay Foster
Directed by Michael Hurst
Trivia: As mentioned on Bruce Campbell's official website back in 1998, the original plot for this episode had Hercules teaming up with an aspiring actor (portrayed by Campbell) called Thespius. Thespius travels with Hercules during the episode because he needs tips on heroism for his latest performance. Later on, as stated in a Whoosh! interview, Paul Robert Coyle mentioned that Jerry Patrick Brown and him rewrote "One Fowl Day" after Kevin Sorbo's injury forced the writing team to lighten his part. It's unknown if they changed it to be a direct conclusion of "Porkules", or if it already had been and they just did rewrites.