| Season 1
|
| File:Home Sweet Pineapple 179.png
|
5b
|
"Home Sweet Pineapple" (tr • ga)
|
Supporting; comes to pick up his son SpongeBob after Nematodes eat his house.
|
| File:Culture Shock 100.png
|
10a
|
"Culture Shock" (tr • ga)
|
Minor; seen watching the Krusty Krab talent show.
|
| Season 2
|
| File:No Free Rides 110.png
|
30a
|
"No Free Rides" (tr • ga)
|
Minor; gives SpongeBob a boat-mobile for passing his driver's test.
|
| Season 4
|
| File:Driven to Tears 117.png
|
77a
|
"Driven to Tears" (tr • ga)
|
Minor; Patrick thinks that Harold and Margaret are his parents only to be remained that their SpongeBob's parent not his.
|
| Season 5
|
| File:New Digs 155.png
|
85a
|
"New Digs" (tr • ga)
|
Minor; Harold and Margaret come to visit SpongeBob.
|
| File:Sing a Song of Patrick 105.png
|
89b
|
"Sing a Song of Patrick" (tr • ga)
|
Portrait cameo; in their picture, Harold and Margaret get annoyed after listening to Twinkle, Twinkle, Patrick Star and Margaret turns the picture.
|
| File:BlackJack 175.png
|
93c
|
"BlackJack" (tr • ga)
|
Supporting; Harold and Margaret go to celebrate their nephew BlackJack release from prison.
|
| Season 6
|
| File:The Slumber Party 075.png
|
110a
|
"The Slumber Party" (tr • ga)
|
Portrait cameo; Mr. Krabs throws the portrait of Harold, Margaret, and an infant SpongeBob.
|
| File:Truth or Square 051.png
|
123-124
|
"Truth or Square" (tr • ga)
|
Minor; seen in a flashback where questions if he and his pregnant wife should at the Krusty Krab.
|
| Season 7
|
| N/A
|
136a
|
"A Day Without Tears" (tr • ga)
|
Mentioned; Squidward mentions that SpongeBob's mother and father sent him a postcard.
|
| Season 8
|
| File:A SquarePants Family Vacation 055.png
|
159
|
"A SquarePants Family Vacation" (tr • ga)
|
Major; goes on vacation with his wife, SpongeBob, and Patrick.
|
| Season 9
|
| File:The Fish Bowl 073.png
|
196a
|
"The Fish Bowl" (tr • ga)
|
Portrait cameo; Sandy places a camera on their portrait.
|
| Season 11
|
| File:The Check-Up 097.png
|
217b
|
"The Check-Up" (tr • ga)
|
Portrait cameo
|
| File:Bunny Hunt 101.png
|
223b
|
"Bunny Hunt" (tr • ga)
|
Portrait cameo
|
| Season 12
|
| File:SpongeBob's Big Birthday Blowout 389.png
|
254-255
|
"SpongeBob's Big Birthday Blowout" (tr • ga)
|
Supporting; he and his wife attend SpongeBob's birthday party.
|
| Season 13
|
| File:Wallhalla 031.png
|
280b
|
"Wallhalla" (tr • ga)
|
Portrait cameo; Harold gets annoyed when SpongeBob gets stick by his walls.
|
| File:Ma and Pa's Big Hurrah 079.png
|
283a
|
"Ma and Pa's Big Hurrah" (tr • ga)
|
Major; Harold and Margaret move in with SpongeBob.
|
| Season 14
|
| File:Momageddon 197.png
|
298a
|
"Momageddon" (tr • ga)
|
Minor; he is seen at the Krusty Krab for Dad Day.
|
| File:Sheldon SquarePants 040.png
|
305b
|
"Sheldon SquarePants" (tr • ga)
|
Supporting; he and Margaret adopt Plankton, and later send him to the Star house after seeing him threaten SpongeBob with a chainsaw.
|
| Season 15
|
| File:Captain Quasar- The Next Iteration 157.png
|
319b
|
"Captain Quasar: The Next Iteration" (tr • ga)
|
Portrait cameo
|
