SpongeBob reads a scary book before bedtime. Because of that he sees scary creatures when he turns off the light. When at the Krusty Krab, he tells Mr. Krabs that if he blinks, he sees something scary. Mr. Krabs tells SpongeBob to get a night light so he won't be scared of the dark. However, he buys more when he finds more darkness in the house. Patrick thinks SpongeBob is throwing a party and goes there, but SpongeBob warns him about the dark so he brings his rock inside SpongeBob's pineapple. While getting more night lights, Squidward tells them that they have too many lights and that it's just their imagination. While getting a lighthouse, it makes an M in the sky so Mermaid Man and Barnacle Boy come. Meanwhile, the Moth, one of Mermaid Man's enemies who he has been searching 57 years for, finds the light, but SpongeBob traps him inside the lighthouse, but the Moth carries the lighthouse along with the Pineapple. SpongeBob and Patrick are alone in the dark until the sun comes up. Patrick goes up to get it, thinking it is a light and SpongeBob falls asleep. Patrick comes down again on fire shouting "Too much light!"
The original airing had Patrick saying "SpongeBob, can I sleep with you again tonight?" This was changed to "Sleepover!" in later airings, possibly because it sounded like implied homosexuality.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
•Happy Sponge Chase Vibes - Nicolas Carr [title card] ‣Stealth by Night - Jack Coles [SpongeBob reading a scary story] ‣Tales from the Swamp (c) - Ron Goodwin [SpongeBob sees a monster] • ? - Nicolas Carr ["Oh, it's just a chair."] ‣Terror by Night - Hubert Clifford [SpongeBob turning his lamp on and off] ‣Daylight Shines Captain Lenoe's - Michael Arthur, Colin Cater, Mick Graves, The Folk Players, Sarah Graves, Simon Ritchie [Krusty Krab exterior] • ? - Jeremy Wakefield [SpongeBob enters, tired] ‣Tales from the Swamp (a) - Ron Goodwin [SpongeBob with a pot over his head] ‣Terror by Night - Hubert Clifford [SpongeBob screaming whenever he blinks] • ? - Jeremy Wakefield [SpongeBob's eyelids propped open] ‣Finger of Fear - Fredric Bayco [scary face in the freezer] • ? - Jeremy Wakefield [Krabs pulls SpongeBob off the ceiling] ‣Keel Row - Brian Peters [Krabs tells SpongeBob to get a night light] ‣Shoppers World - Harry Bluestone [SpongeBob shopping] ‣Abject Terror - Paul Lewis [SpongeBob screams] ‣Tomfoolery - David Snell [SpongeBob putting night lights everywhere] ‣Voodoo Victim - Gilbert Vinter ["I've got darkness inside of me!"] • ? - Jeremy Wakefield [Patrick wakes up] ‣ ? ["SpongeBob's having a party without me?"] ‣Murder in Mind - Ronald Hanmer ["That was close, Patrick."] ‣Star Parade - Tony Kinsey ["Sleepover!"] ‣Brass Flourish (a) - Barrie Hingley ["Your sleeping bag, sir."] ‣Tripping Upstairs - Brian Peters [SpongeBob and Patrick hopping] • ? - Nicolas Carr [gaping hole] ‣Six Powerful Cues (d) - Wilfred William Burns ["THE DARK!"] ‣Graveyard - Johnny Pearson [Squidward asleep] ‣Drama Link (d) - Hubert Clifford [Squidward's eyes burned] • ? - Sage Guyton, Jeremy Wakefield [SpongeBob, Patrick whimpering] ‣Dramatic Cue (h) - Ronald Hanmer ["I can feel it, Pat."] ‣Comic Walk - Sidney Torch ["It's me, Squidward, you idiots."] ‣Fates - Gregor F. Narholz ["No, Squidward! Don't go out in the dark!"] • ? - Sage Guyton, Jeremy Wakefield ["Quick, SpongeBob, turn it on."] ‣Potato Chips - Wade Denning [Pinky's Dance Studio sign] • ? - Sage Guyton, Jeremy Wakefield [more lights] ‣ ? [M signal] ‣Happy and Gay - Harry Bluestone, Emil Cadkin [Mermaid Man and Barnacle Boy watching TV] ‣Life on the Wild Side - Sam Spence [Mermaid Man sees the signal] • ? - Sage Guyton, Jeremy Wakefield ["More lights, SpongeBob, more lights!"] ‣Tympup A - Sammy Burdson, John Charles Fiddy ["Mermaid Man!"/"Barnacle Boy!"] • ? - Nicolas Carr ["Mermaid Man!"/"Barnacle Boy!"] ‣ ? [signal] •Seaweed - Steve Belfer [SpongeBob explains] ‣Brave and Bold - Chris Payne, Paul Rogers [moth appears] ‣Six Powerful Cues (a) - Wilfred William Burns ["Dear Neptune!"] ‣Caped Crusader - David Farnon ["Come get some... fiend!"] ‣Ramblin' Man from Gramblin' - Sam Spence [Absorbo-Pants] ‣The Beast Within - Paddy Kingsland ["Savory light, come to me."] ‣Ramblin' Man from Gramblin' - Sam Spence [moth trapped] ‣Cellar Search - Philippe Pares [moth flies away with SpongeBob's house] ‣Alekoki - Kapono Beamer [Mermaid Man and Barnacle Boy leave] ‣Hawaiian Cocktail - Richard Myhill ["We're all alone, Patrick."] ‣ ? [sunrise] ‣Old Hilo March - Kapono Beamer [ending]
SpongeBob develops boogophobia, a phobia of the "boogeyman".
Double Irony: A normal child with a fear of the dark would usually sleep with only one night light. SpongeBob, out of desperation and fear, bought way too many night lights to light up the pineapple in the most impossible way, since one night light wasn't enough for him. And he wasn't able to get any sleep until the end of the episode.
Running Gag: SpongeBob getting more lights.
The scary face is seen in the freezer at the Krusty Krab
When SpongeBob and Patrick meet Mermaid Man and Barnacle Boy they are all outside. After the shot with the letter "M", they are all in the pineapple.
The Moth looks similar to Superman, the Owlman, Mothman and even Man Ray.
In this episode, Mermaid Man's belt is purple. In other episodes, it is yellow and black.
When Moth lifts up SpongeBob's entire pineapple, only the very top should go since it detached from the rest of the house.
It is revealed that Squidward has a mirror on his bedroom ceiling.
The Moth is voiced by Mark Hamill who plays Luke Skywalker in the Star Wars films.
This is the first episode with Mermaid Man and Barnacle Boy appearing and not having their names in the title. Chronologically, the unofficial name of the episode was 'Mermaid Man and Barnacle Boy VII', but the sequencing stopped after Mermaid Man and Barnacle Boy VI: The Motion Picture.
When SpongeBob looked at the bathroom being dark, if one would look closely (or possibly stand up), his pet scallop can be seen
When the light house shines it's light through the pineapple, at first the "M" looks like it has more of a curve, but when Mermaid Man finds out the signal is a false alarm, the signal looks like a normal "M".
The episode jumps out off topic, from night light matters to a Mermaid man and Barnacle Boy conflict.
The novel SpongeBob reads breaks its fourth wall, talking about the author dying before finishing the story.
The Big "M" signal in the sky is a reference to the Bat-Signal from Batman.
Patrick looks out his window thinking SpongeBob's having a party. However, most of Patrick's house is underground, so this is impossible and Patrick never had a window in other episodes.
When Patrick was in SpongeBob's mouth after Squidward scared them, he came out after Squidward told them it was him, but without his sleeping hat. The next shot he was seen, his hat is back on his head.
When Patrick watches SpongeBob's house, he's seeing it from an impossible angle, because Squidward's house is between them. This error also happens in The Pink Purloiner.
When SpongeBob asks Mermaid Man and Barnacle Boy if they're here to protect them from the darkness, he doesn't have any legs.