After four days, SpongeBob and Patrick are still silently waiting for the jellyfishes to move. Finally, it swims away, and the chase it on! The plan is for SpongeBob to take one side, and Patrick then takes the other. But, as the both approach the jellyfish, they end up colliding, letting the jellyfish escape.
They continue chasing the jellyfish, they don't watch where they are going and accidentally fall off a cliff, falling way down to a county-like village and land on a port-a-potty. Many of the trenchbillies gang up on SpongeBob and Patrick and capture them with a rope. They take them to Ma Angler, who says that they are "awful purdy". Ma Angler orders them to an initiation. SpongeBob and Patrick question them and Ma Angler sentences them to a series of challenges, being: a banjo contest, "hootin" and hollering" contest, and a wrestling match. SpongeBob and Patrick win the first two competitions but decline to the wrestling match, claiming that "they don't like to wrestle".
Ma Angler is surprised and aasks them what they like to do for fun. SpongeBob claims that they like to jellyfish. They show the trenchbillies how to jellyfish and collide, once again. Ma Angler enjoys this. The trenchbillies laugh at them and call them dumb. Ma Angler certifies them as official honorary trenchbillies and gives them novelty teeth. SpongeBob gives a short speech and attempts to leave, however, they are stopped by a group of the trenchbillies. One of the trenchbillies says that they have to take care of Ma Angler for the rest of their lives. SpongeBob and Patrick try to convince them to let them leave but the trenchbillies won't let them.
Meanwhile, at the Krusty Krab, Mr. Krabs and Squidward lightly chat, SpongeBob and Patrick burst through the door and the trenchbillies follow them. The trenchbillies destroy the Krusty Krab out of anger. Mr. Krabs, nervously, asks them for their orders, they all order something to eat. Mr. Krabs says that Ma Angler, who is eating a lot of Krabby Patties, will make Customer of the Week. One of the trenchbillies sees Mr. Krabs making "goo-goo eyes at the Ma Angler" and as the episode ends, Mr. Krabs is forced to get "hitched" (married) to Ma Angler.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
‣ ? [title card] ‣Excited Tension 2 - Phillip Green [opening at Jellyfish Fields] •Sponge Monger - Sage Guyton, Jeremy Wakefield [SpongeBob, Patrick chasing the jellyfish] •Vibe Sting - Nicolas Carr ["Your what?"] •Hawaiian Trax - Sage Guyton, Jeremy Wakefield ["Patrick, there it goes!"] ‣Rescue - Cecil Milner [SpongeBob and Patrick fall down a trench] ‣Horror Crash - Harry Lubin [they land in an outhouse] ‣ ? [trenchbillies introduced] •Closing the Door - Nicolas Carr [SpongeBob and Patrick tied up] ‣ ? ["Well, tell me again."] •Vibe Q Sting - Nicolas Carr ["Um..."] ‣The Great White - Gregor F. Narholz [SpongeBob and Patrick gulp] ‣ ? ["Go get your fiddle."] •Hillbilly Dual - Nicolas Carr, Sage Guyton, Jeremy Wakefield [fiddle song] •Harp Ding - Nicolas Carr [trenchbilly takes off suspenders] •Hillbilly Dual - Nicolas Carr, Sage Guyton, Jeremy Wakefield [song continues] • ? - Jeremy Wakefield ["It looks like he was the real... star."] •Skipping to School - Sage Guyton, Jeremy Wakefield [singing competition] ‣ ? [wrestling match] ‣ ? [SpongeBob nervous] •Sponge Monger - Sage Guyton, Jeremy Wakefield ["What the...?"] ‣ ? [everyone laughs] ‣ ? ["Go get 'em, tiger."] ‣Dramatic Bridge 1 - Phillip Green [trenchbillies won't let SpongeBob and Patrick leave] ‣Cloak and Dagger [#69] - Phillip Green ["Taking care of Ma?"] ‣ ? ["You know, carry her purse..."] • ? - Jeremy Wakefield ["Well, that all sounds like fun..."] ‣Terror Hunt - Phillip Green ["You folks ain't going nowhere."] ‣Tympup B - Sammy Burdson, John Charles Fiddy [SpongeBob and Patrick gone] •Hawaiian Sting - Nicolas Carr [SpongeBob and Patrick gone] • ? - Michael Bolger, Nicolas Carr [at the Krusty Krab] ‣Drama Link (g) - Hubert Clifford ["Mr. Krabs!"] ‣ ? [trenchbillies destroying Krusty Krab] • ? - Michael Bolger, Nicolas Carr [Krabs nervous] ‣Sailor's Sting 4 - Trenchbillies eating Krabby Patties ‣ ? [ending]
This is the third time the Krusty Krab is open on Sunday (although they are normally closed on Sunday), the first being "Squid's Day Off" and the second being "That's No Lady."
The scene where SpongeBob and Patrick are in a "musical challenge" is a parody of the famous banjo scene from Deliverance.
The trenchbillies have no pupils due to that fact that they strike a resemblance to the angler fish which lives deep into the ocean and doesn't see along with no pupils hence the trenchbillies having no pupils.
This is one of the rare episodes where Squidward cares about the Krusty Krab customers (since he's complaining that Mr. Krabs didn't give the customer his money back).
Parts of the plot are very similar to Rock Bottom (i.e. The beginning when in both episodes have characters end in an area deep in the ocean; in this episode it's a trench, in Rock Bottom, it is a tall cliff.)
The name Trenchbilly is a parody of a Hillbilly.
The episode's name may be a parody of the Adult Swim show, Squidbillies.
Another similarity is that Ma Angler is like Rusty's mother in Squidbillies in that they are both extremely fat and cannot move from one place to another on their own.
It is unknown how SpongeBob, Patrick, and the Trenchbillies got out from the trench.
When Teether went out of the house, the smoke is gray, but when he came back, it is black again.
Several times when SpongeBob was looking at the jellyfish from his binoculars, his mouth crossed over his arm.