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Season guide

Arthur: Season 20

14 episodes Premiered Oct 10, 2016 Updated Oct 16, 2026
Previously on Arthur

Season 20 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Picks up essential narrative continuity directly following the events of Arthur Season 19.
  • ⚡ Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
  • ⚡ Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
  • ⚡ Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
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Season 20 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 20 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 20: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

21%
79%
Mytharc (3): Crucial lore & season climaxes
Core (11): Character development & subplots
Side Quest (0): Standalone / filler
S20·E1 Mytharc

Buster's Second Chance

Oct 10, 2016 · 13 min

After Brain wins a science fair, Buster begins to wonder how different his life would be if he was smarter.

S20·E2 Core

Arthur and the Whole Truth

Oct 10, 2016 · 13 min

While Arthur is practicing for a piano recital, he learns that Buster has been telling him white lies just to not hurt his feelings. Arthur and Buster agree to not tell any more wh

S20·E4 Core

Cereal

Oct 11, 2016 · 13 min

After a box of D.W.'s favorite cereal goes missing, Arthur is accused of taking it.

S20·E5 Core

He Said, He Said

Oct 12, 2016 · 13 min

Arthur, Buster, and George are excited to watch a special Bionic Bunny episode, but the TV blacks out. Meanwhile, D.W. and Bud are building a huge Tower of Cows, which Carl also st

S20·E6 Core

Bunny Trouble

Oct 12, 2016 · 13 min

It's D.W.'s turn to watch the preschool class bunny.

S20·E7 Core

Bud's Knotty Problem

Oct 13, 2016 · 13 min

Bud learns to tie his shoes after seeing a pair of boots that he wants.

S20·E8 Core

That's My Grandma!

Oct 13, 2016 · 13 min

When Grandma Thora becomes the most popular babysitter in Elwood City, D.W. becomes upset.

S20·E9 Core

Lend Me Your Ear

May 30, 2017 · 13 min

Mr. Ratburn has a complete change in attitude, much to Arthur, Buster, and Brain's concern.

S20·E10 Core

The Butler Did It

May 30, 2017 · 13 min

Mr. Crosswire gets a robot butler, but Muffy fears Bailey may be replaced.

S20·E12 Core

Mutiny on the Pitch

May 31, 2017 · 13 min

Francine decides to leave her soccer position to Buster when the Lakewood Elementary soccer team claims she is too bossy.

S20·E13 Mytharc

The Hallway Minotaur

Jun 1, 2017 · 13 min

George becomes the Lakewood Elementary hallway monitor.

S20·E14 Mytharc

Ladonna's Like List

Jun 1, 2017 · 13 min

Ladonna begins a list to see how many people like her.

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