archytele The Vault
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Season guide

Casualty: Series 21

48 episodes Premiered Sep 23, 2006 Updated Sep 25, 2026
Previously on Casualty

Season 21 Lore Primer

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

  • ⚡ Directly follows the overarching narrative developments of Casualty Season 20.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 21 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 21 Progress Shield

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

Season 21: Filler vs. Essential Canon

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

94%
Mytharc (3): Crucial lore & season climaxes
Core (45): Character development & subplots
Side Quest (0): Standalone / filler
S21·E29 Core

Sweet Charity

Mar 10, 2007

A special episode to link in with the Red Nose Day charity appeal.

S21·E31 Core

Stitch

Mar 18, 2007

S21·E33 Core

Day One

Mar 31, 2007

S21·E35 Core

Lush

Apr 14, 2007

S21·E36 Core

Aliens

Apr 28, 2007

S21·E42 Core

Entropy

Jun 16, 2007

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