Echidna and Typhon were invited to the wedding, but were unable to attend because the former was pregnant. Their newest child would be seen in "Monster Child in the Promised Land".
Nitpick: The idea that Jason would have to give up his throne to marry Alcmene would have been hysterical to the ancient Greeks. Aside from the fact that there was no law barring kings from marrying commoners, Alcmene was no commoner: she was the granddaughter of Perseus on her father's side and great-granddaughter of Tantalus on her mother's.
This is the second sea serpent that we have seen Hercules battle. He killed the first in the TV movie "Hercules and the Lost Kingdom". Nathaniel Lees reprises the role of the Blue Priest from the same movie.
Goof: When Iolaus runs to get Iphicles to ask him to become King of Corinth, he runs into Dirce and Falafel selling tacos. As Iolaus and Dirce are discussing their "date", the taco in Dirce's hand appears to be half-eaten, then it's all there, then it's half-eaten again.
Goof: Just as the monster emerges to terrorize the wedding guests, who of course scatter in all directions, look carefully to the right in the scene. You can see Deric, the centaur, minus his hoofed legs. Instead, human legs (the legs of the actor) are clearly visible.
Goof: You can see a human finger on Hera's minion beneath the costume.
Blue Priest: Who's going to save you now?
Iolaus: Aren't you supposed to be dead? Hercules chopped your head off.
Blue Priest: Hera didn't approve.
Jason: (Referring to his romance with Hercules' mother) Exactly how should I have brought up the subject to you?
Hercules: Well, that's something you should have figured out!
Jason: Why don't we talk about this when you're feeling a little less petulant.
Hercules: Petulant?! He's acting like he's my father already!
Falafel: I cater weddings. Best buffet dinner you ever ate! Cake, eight feet tall minimum. Ambrosia!
Iolaus: Oh, you mean the food of the Gods?
Falafel: No! A salad, with many marshmallows!
Jason: (being eyed by a creature inside the sea serpent) What is that thing?!
Hercules: Does it matter?!
Salmoneus: (arriving after everything was over) I didn't miss anything, did I?
In Memory of Jerry Siegel
When the centaur Deric first arrives in Corinth for the wedding Hercules asks him if Lyla and Kefor are with him. Lyla is his wife, played by Lucy Lawless in both the episodes "As Darkness Falls" and "Outcast". In addition, Deric tells Hercules that Lyla and their son are visiting his cousin Phantes. Phantes is the centaur that the Amazon Ephiny met and later married on Xena: Warrior Princess.
Iolaus: (when asked to deliver invitations) Through rain, sleet, and snow, I'm your man.
Often incorrectly cited as the creed of the US Postal Service, this is actually a paraphrase of the Greek Historian Herodotus, who was writing about the ancient Persian courier service. He wrote: "It is said that as many days as there are in the whole journey, so many are the men and horses that stand along the road, each horse and man at the interval of a day's journey; and these are stayed neither by snow nor rain nor heat nor darkness from accomplishing their appointed course with all speed." (trans. A.D. Godley 1924)