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List of Mermaid Man and Barnacle Boy Episodes

Title card # Title Airdate U.S. viewers (millions)
Mermaid Man and Barnacle Boy title card
6a "Mermaid Man and Barnacle Boy" August 21, 1999
2.20
SpongeBob and Patrick learn that their heroes are retired.
Mermaid Man and Barnacle Boy II title card
20b "Mermaid Man and Barnacle Boy II" April 8, 2000
N/A
SpongeBob wins a conch shell in a contest to summon his heroes.
Mermaid Man and Barnacle Boy III title card
31a "Mermaid Man and Barnacle Boy III" November 27, 2000
N/A
SpongeBob and Patrick accidentally free the evil Man Ray.
Mermaid Man and Barnacle Boy IV title card
45a "Mermaid Man and Barnacle Boy IV" January 21, 2002
N/A
SpongeBob plays with Mermaid Man's secret utility belt.
Mermaid Man and Barnacle Boy V title card
52b "Mermaid Man and Barnacle Boy V" June 1, 2002
N/A
Barnacle Boy joins the dark side.
Mermaid Man and Barnacle Boy VI The Motion Picture title card
67b "Mermaid Man & Barnacle Boy VI: The Motion Picture" October 7, 2005
N/A
SpongeBob and Patrick make a Mermaid Man and Barnacle Boy movie.
Night Light title card
82b "Night Light" July 30, 2007
N/A
SpongeBob reads a scary book and develops a fear of the dark.
Mermaid Man vs. SpongeBob title card
94b "Mermaid Man vs. SpongeBob" August 3, 2007
N/A
Plankton hypnotizes Mermaid Man and Barnacle Boy.
The Card title card
113b "The Card" November 28, 2008
N/A
Patrick finds a rare trading card and SpongeBob tries to protect it.
Ditchin' title card
114b "Ditchin'" November 28, 2008
N/A
SpongeBob ditches boating school, then gets distracted on his way back.
Shuffleboarding title card
117a "Shuffleboarding" February 16, 2009
4.51
SpongeBob and Patrick pretend to be their heroes at a shuffleboarding contest, but get sidetracked on the way home.
Back to the Past title card
135a "Back to the Past" February 15, 2010
4.39
SpongeBob and Patrick accidentally change past events with Mermaid Man's time machine.
The Bad Guy Club for Villains title card
135b "The Bad Guy Club for Villains" February 15, 2010
4.39
SpongeBob and Patrick watch a lost episode of The Adventures of Mermaid Man and Barnacle Boy.
Mermaid Man Begins title card
163a "Mermaid Man Begins" September 23, 2011
2.65
SpongeBob and Patrick learn the story of their heroes' origins.
Super Evil Aquatic Villain Team Up is Go! title card
176a "Super Evil Aquatic Villain Team Up is Go!" October 14, 2012
2.28
Plankton and Man Ray join forces and try to override the Krusty Krab.
Patrick-Man! title card
180a "Patrick-Man!" October 27, 2012
4.10
Patrick becomes a superhero and plans to clean up Bikini Bottom.
MermaidPants
205b "Mermaid Pants" October 29, 2016
2.17
When SpongeBob and Patrick play Mermaid Man and Barnacle Boy, it's all fun and games until their "sworn enemies" arrive.
Man Ray Returns
219a "Man Ray Returns" September 30, 2017
2.07
When Man Ray rents Squidward's house for the weekend, it's up to SpongeBob and Patrick to stop his evil vacation.
Appointment TV
238a "Appointment TV" October 28, 2018
1.25
The long-lost episode of "Mermaid Man" is finally showing on TV, but SpongeBob may not make it home in time to watch.

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