Episodes marked with * have only some plot important elements.

Episodes marked with ** have almost none or none plot importance but are interesting fillers.



Season, Episode, 	Title, 								Reason
1, 		5, 			The Enchiridion!, 					"A good intro to the series, plus introduces the important Enchiridion"
1, 		8, 			Business Time*, 					"First mention of Ooo being post-apocalyptic"
1, 		9, 			My Two Favorite People, 			"Intros the Jake and LR plotline"
1, 		10,			Memories of Boom Boom Mountain, 	"A look at how Finn was adopted into Jake's Family"
1, 		12, 		Evicted!, 							"Intros Marceline"
1, 		16, 		Ocean of Fear, 						"Introduces Finn's phobia"
1, 		22, 		Henchman*, 							"Establishes Finn and Marceline as friends"
1, 		23, 		Rainy Day Daydream*, 				"Good episode to show someone who’s never seen the show before"
1, 		25, 		His Hero, 							"Introduces the Lich and Billy"
2, 		1, 			It Came from the Nightosphere, 		"Significant to Marceline's Personal Plotline"
2, 		12, 		Her Parents, 						"Continuation of Jake and LR Storyline"
2, 		17, 		Death in Bloom, 					"Separates the Nightosphere from the Dead Worlds"
2, 		18, 		Susan Strong*, 						"Significant for Susan's Possible Humanity"
2, 		22, 		The Limit*, 						"Jake Character Development"
2, 		24, 		Mortal Folly, 						"Lich Plotline"
2, 		25, 		Mortal Recoil, 						"Lich Plotline"
3, 		3, 			Memory of Memory, 					"Introduces Hambo, some of Marcy’s backstory"
3, 		5, 			Too Young*, 						"Princess Bubblegum and wrapping up 2,  Finale, Intro to Lemongrab plot"
3, 		9, 			Fionna and Cake*, 					"A fan favorite"
3, 		10,			What Was Missing, 					"Important characterization"
3, 		12, 		The Creeps*, 						"Hints to future episode"
3, 		14, 		Beautopia*, 						"Continues Susan Strong story line"
3, 		19, 		Holly Jolly Secrets 1, 				"Ice King and Mushroom War Plot"
3, 		20, 		Holly Jolly Secrets 2, 				"Ice King and Mushroom War Plot"
3, 		25, 		Dad's Dungeon, 						"Finn and Jake Background"
3, 		26, 		Incendium*, 						"Flame Princess Plot Intro"
4, 		1, 			Hot to the Touch*, 					"Flame Princess Subplot"
4, 		2, 			Five Short Graybles*, 				"For the Exploded map of Earth in the Intro"
4, 		5, 			Return to the Nightosphere, 		"Marceline Background"
4, 		6, 			Daddy's Little Monster, 			"Marceline Background"
4, 		7, 			In Your Footsteps*, 				"Lich Plot at End"
4, 		10, 		Goliad*, 							"Finn and PB character development, maybe a returning plot?"
4, 		15, 		Sons of Mars, 						"Introduces GGGG"
4, 		16, 		Burning Low*, 						"Flame Princess Plot"
4, 		18, 		King Worm*, 						"Hints to future events"
4, 		20, 		You Made Me*, 						"Lemongrab Plot"
4, 		22, 		Ignition Point*, 					"Flame Princess Plot"
4, 		25, 		I Remember You, 					"Marceline and Simon Plot"
4, 		26, 		The Lich, 							"Lich Plot"
5, 		1, 			Finn The Human, 					"Lich Plot and Mushroom War"
5, 		2, 			Jake The Dog, 						"See Above"
5, 		6, 			Jake the Dad, 						"Jake and Lady Rainicorn Plot"
5, 		9, 			All Your Fault*, 					"Lemongrab Plot"
5, 		11, 		Bad Little Boy*, 					"Marceline and Ice King's day-to-day relationship, Fionna and Cake subplot"
5, 		12, 		Vault of Bones*, 					"Flame Princess Plot"
5, 		14, 		Simon and Marcy, 					"Simon and Marceline Plot, Mushroom War"
5, 		16, 		Puhoy*, 							"Flame Princess Plot"
5, 		21, 		The Suitor*, 						"Princess Bubblegum Character Development"
5, 		23, 		One Last Job*, 						"Has Jake’s kids and a bit of his back story"
5, 		24, 		Another Five More Short Graybles*, 	"Some slight plot elements that come back"
5, 		28, 		Be More*, 							"BMO backstory"
5, 		29, 		Sky Which, 							"Reclaiming Hambo"
5, 		30, 		Frost & Fire*, 						"Flame Princess Plot"
5, 		31, 		Too Old*, 							"Finn finally gives up on PB, Lemongrab Plot, Intro to Lemonhope"
5, 		32, 		Earth & Water*, 					"Flame Princess Plot"
5, 		34, 		The Vault*, 						"Princess Bubblegum background story"
5, 		38, 		Red Starved*, 						"A Possible insight into Marceline and PB's relationship."
5, 		40, 		Play Date*, 						"Finn Character Development"
5, 		41, 		The Pit*, 							"Finn Character Development"
5, 		43, 		Root Beer Guy*, 					"Slight plot elements"
5, 		45, 		Blade of Grass, 					"Finn Character Development"
5, 		46, 		Rattleballs, 						"Finn Character Development"
5, 		47, 		The Red Throne*, 					"Flame Princess Plot"
5, 		48, 		Betty, 								"Ice King/Simon Plot"
5, 		50, 		Lemonhope Pt.1, 					"Lemonhope Plot"
5, 		51, 		Lemonhope Pt.2, 					"Lemonhope Plot"
5, 		52, 		Billy’s Bucket List*, 				"Intro to Finn’s dad plot"
6, 		1, 			Wake Up, 							"Finn’s Dad plot"
6, 		2, 			Escape from the Citadel, 			"Finn’s dad plot"
6, 		4, 			The Tower*, 						"Finn Character Development"
6, 		6, 			Breezy, 							"Finn Character Development"
6, 		10, 		Something Big*, 					"Perhaps the beginning of a returning plot?"
6, 		16, 		Joshua & Margaret Investigations, 	"Jake’s backstory"
6, 		19, 		Is That You?, 						"Prismo Plot"
6, 		22, 		The Cooler*, 						"Flame Princess Plot"
6, 		24, 		Evergreen, 							"Ice King Plot"
6, 		25, 		Astral Plane, 						"Finn’s dad plot"
6, 		26, 		Gold Stars, 						"Lich Plot"
6, 		27, 		The Visitor, 						"Finn’s dad Plot"
6, 		28, 		The Mountain*, 						"Some Finn/FP and Lemongrab characterization"
6, 		29, 		Dark Purple*, 						"Susan Strong Plot"
6, 		33, 		Jermaine*, 							"Finn and Jake family development"
6, 		35, 		Graybles 1000+*, 					"Hints to future events"
6, 		36, 		Hoots, 								"Cosmic owl character development; Hints to Gunter's identity"
6, 		38, 		You Forgot Your Floaties, 			"Betty comeback; Magic man plot"
6,	 	39, 		Be Sweet*, 							"Hint for the Comet"
6, 		40, 		Orgalorg, 							"Introduces Orgalorg"
6, 		41, 		On the Lam, 						"Finn's Dad plot"
6, 		42, 		Hot Diggity Doom, 					"Princess Bubblegum; King of Ooo; the Comet"
6, 		43, 		The Comet, 							"The Comet (duh); Orgalorg; Finn's Dad"
7, 		1, 			Bonnie & Neddy, 					"King of Ooo; Candy Kingdom; PB's brother"
7, 		2, 			Varmints, 							"PB and Marceline development and some background story"
7, 		3, 			Cherry Cream Soda*, 				"Root Beer Guy plot
7, 		4, 			Mama Said*, 						"Canyon comeback"
7, 		5, 			Football*, 							"BMO and Football; Football's life"
7, 		6, 			Stakes Part 1: Marceline The Vampire Queen, 	"Awesome Marceline plot and background story across 8 episodes"
7, 		7, 			Stakes Part 2: Everything Stays, 				"Awesome Marceline plot and background story across 8 episodes"
7, 		8, 			Stakes Part 3: Vamps About, 					"Awesome Marceline plot and background story across 8 episodes "
7, 		9, 			Stakes Part 4: Empress Eyes, 					"Awesome Marceline plot and background story across 8 episodes"
7, 		10, 		Stakes Part 5: May I Come In?, 					"Awesome Marceline plot and background story across 8 episodes"
7, 		11, 		Stakes Part 6: Take Her Back,					"Awesome Marceline plot and background story across 8 episodes"
7, 		12, 		Stakes Part 7: Checkmate, 						"Awesome Marceline plot and background story across 8 episodes"
7, 		13, 		Stakes Part 8: The Dark Cloud, 					"Awesome Marceline plot and background story across 8 episodes"
7, 		14, 		The More You Moe, 					"MOs backstory"
7, 		15, 		The Moe You Know, 					"MOs backstory"
7, 		16,			Summer Showers*, 					"Viola story"
7, 		21, 		King's Ransom, 						"Ice King; Gunter and Betty"
7, 		23, 		Crossover, 							"Farmworld development; the Lich and Ice Finn"
7, 		24, 		Hall of Egress**, 					"Just Wowed - Not a main plot"
7, 		25, 		Flute Spell*, 						"Huntress Wizard; Finn's flute playing"
7, 		26, 		The Thin Yellow Line**, 			"Banana Guards and PB - Not much main plot"
8, 		1, 			Broken His Crown, 					"Some of Ice King's crown backstory + more Betty; PB and Marceline"
8, 		2, 			Don't Look*, 						"How Finn sees some characters"
8, 		4, 			Lady Rainicorn...*, 				"Some Lady background story and T.V. development"
8, 		5, 			I Am a Sword, 						"Sword Finn development"
8, 		6, 			Bun Bun*, 							"Some FP and Finn development; Flame King development"
8, 		7, 			Normal Man, 						"Magic Man; GGGG and Mars plot"
8, 		8, 			Elemental, 							"Patience intro; Elementals History; Flashbacks before the Lich Explosion"
8, 		10, 		The Music Hole, 					"Finn Sword development"
8, 		11, 		Daddy-Daughter Card Wars*, 			"Some Jake background story; Charlie development"
8, 		12, 		Pre-boot, 							"Humans backstory; Susan development; Tiffany comeback"
8, 		13, 		Reboot, 							"Susan development; Finn Sword and Grass Sword development"
8, 		14, 		Two Swords, 						"Grass Finn development"
8, 		15, 		Do No Harm, 						"Grass Finn becomes Fern the Human"
8, 		16, 		Wheels, 							"Jake's granddaughter"
8, 		17, 		High Strangeness, 					"Tree Trunks and PB's relationship; TT's space family; PB's space program"
8, 		18, 		Horse and Ball**, 					"James Backster - Non a main plot but kinda fun"
8, 		19, 		Jelly Beans Have Power, 			"PB's elemental powers; Patience comeback"
8, 		20, 		Islands Part 1: The Invitation, 			"Susan Strong and Humans backstory; the Departure"
8, 		21, 		Islands Part 2: Whipple the Happy Dragon*, 	"The Guardian; Arrival at an Island"
8, 		22, 		Islands Part 3: Mysterious Island, 			"Some Human backstory; Alva and the Islands"
8, 		23, 		Islands Part 4: Imaginary Resources, 		"Better Reality"
8, 		24, 		Islands Part 5: Hide and Seek, 				"Humans and Susan backstory; Susan remembers her past"
8, 		25, 		Islands Part 6: Min & Marty, 				"Finn's parents' backstory"
8, 		26, 		Islands Part 7: Helpers, 					"The New Human World"
8, 		27, 		Islands Part 8: The Light Cloud, 			"Back to Ooo"
9,		1, 			Orb, 								"The New Ooo"
9, 		2, 			Elements Part 1: Skyhooks, 			"Candy Kingdom; The New Ooo"
9, 		3, 			Elements Part 2: Bespoken For, 		"What happened in Finn and Jake's absence; Betty comeback"
9, 		4, 			Elements Part 3: Winter Light, 		"Ice Kingdom; Getting Betty"
9, 		5, 			Elements Part 4: Cloudy, 			"Chilling Haircuts; the Plan"
9, 		6, 			Elements Part 5: Slime Central, 	"Slime Kingdom; Jake Dies"
9, 		7, 			Elements Part 6: Happy Warrior, 	"Flame Kingdom; Finn Turns"
9, 		8, 			Elements Part 7: Hero Heart, 		"LSP Save; All Jewels Are Gathered; Betty's plan"
9, 		9, 			Elements Part 8: Skyhooks II, 		"The Fifth Element"
9, 		10, 		Abstract, 							"Jake development"
9, 		11, 		Ketchup*, 							"Minor Marceline background"
9, 		12, 		Fionna and Cake and Fionna**, 		"Fionna and Cake subplot"
9, 		13, 		Whispers, 							"Fern and Lich plot"
9, 		14, 		Three Buckets, 						"Fern plot"
10, 	1, 			The Wild Hunt*, 					"Minor Gumbald plot"
10, 	2, 			Always BMO Closing*, 				"Minor Gumbald plot"
10, 	3, 			Son of Rap Bear**, 					"Minor Flame Princess development"
10, 	4, 			Bonnibel Bubblegum, 				"Gumbald plot"
10, 	5, 			Seventeen, 							"Fern & Gumbald plot"
10, 	6, 			Ring of Fire**, 					"Tree Trunks plot"
10, 	7, 			Marcy & Hunson, 					"Marceline development, minor Gumbald plot"
10, 	8, 			The First Investigation*, 			"Jake development"
10, 	10, 		Jake the Starchild, 				"Jake development"
10, 	11, 		Temple of Mars, 					"Jake & Betty development"
10, 	12, 		Gumbaldia, 							"Gumbald plot"
10, 	13, 		Come Along with Me, 				"End"