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Season guide

Red vs. Blue: Season 4

20 episodes Premiered Aug 29, 2005 Updated Sep 25, 2026

The fourth season of the action-comedy series Red vs. Blue and part of The Blood Gulch Chronicles. A bomb with a bad attitude, an alien with an epic score to settle, and the usual gang of hapless soldiers are on a quest to save the universe from an ancient prophecy of destruction. The situation doesn't look too good...

Previously on Red vs. Blue

Season 4 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 Red vs. Blue Season 3.
  • ⚡ 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.

Season overview

The fourth season of the action-comedy series Red vs. Blue and part of The Blood Gulch Chronicles. A bomb with a bad attitude, an alien with an epic score to settle, and the usual gang of hapless soldiers are on a quest to save the universe from an ancient prophecy of destruction. The situation doesn't look too good...

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Season 4 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 4 Progress Shield

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Binge Efficiency Engine

Season 4: Filler vs. Essential Canon

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

15%
85%
Mytharc (3): Crucial lore & season climaxes
Core (17): Character development & subplots
Side Quest (0): Standalone / filler
S4·E1 Mytharc

Familiar Surroundings

Aug 29, 2005 · 4 min

Grif has a hard time coming to terms with the Red team's unexpected return to Blood Gulch; meanwhile back on Zanzibar, Church gets scared out of his own body.

S4·E2 Core

Hunting Time

Sep 5, 2005 · 4 min

Tex, Tucker, and Church search for the big thing while Sarge tries a new strategy to get Grif down from the ledge.

S4·E3 Core

Fight or Fright

Sep 12, 2005 · 6 min

Simmons is frustrated that Sarge won't believe he saw a tank while the Blues send in bait to lure the alien into a trap.

S4·E4 Core

Fair Competition

Sep 19, 2005 · 5 min

Donut finds competition in his attempt to become the Reds new second in command while Caboose introduces the blues to the Alien.

S4·E5 Core

Lost in Triangulation

Sep 28, 2005 · 6 min

The Blues continue to try translating what the alien is saying, while the Reds continue Sarge's right-hand-man contest.

S4·E6 Core

The Hard Stop

Oct 5, 2005 · 5 min

Tucker tries to teach the Alien how to speak English while Donut keeps Simmons away from the Red Base.

S4·E7 Core

Previous Commitments

Oct 17, 2005 · 5 min

The Blues find someone to translate the Alien language while Simmons mounts an assault on the Red Base.

S4·E8 Core

Looking For Group

Oct 24, 2005 · 4 min

Tucker, Caboose, Andy and the Alien prepare for a dangerous quest while Grif tries to talk Simmons out of killing all the Reds.

S4·E9 Core

Exploring Our Differences

Nov 7, 2005 · 4 min

Simmons takes Grif hostage while Church has a heart to heart with Tucker about his dangerous quest.

S4·E10 Core

Setting A High Bar

Nov 22, 2005 · 4 min

Donut and Sarge investigate Grif’s kidnapping, while the Quest team arrives at the burning planes to face a demon.

S4·E11 Core

Getting All Misty

Dec 5, 2005 · 5 min

Sarge’s rescue attempt goes awry while the Quest team uses Tucker as bait.

S4·E12 Core

Talk Of The Town

Dec 13, 2005 · 4 min

The Quest team arrives at the freezing planes while Church negotiates a surrender with Donut.

S4·E13 Core

Sneaking In

Dec 20, 2005 · 4 min

Tex storms the Freezing Planes base while Donut explains to Sarge and Grif how he led the greatest military operation ever to free them.

S4·E14 Core

You Keep Using That Word

Jan 13, 2006 · 5 min

Sheila gets mad over Church’s new fleet while a new Spartan creates an obstacle for the Quest.

S4·E15 Core

Getting Debriefed

Jan 23, 2006 · 4 min

Simmons comes back to the Red Base while the Quest team return from a disastrous encounter.

S4·E16 Core

Under The Weather

Feb 10, 2006 · 6 min

At the Blue Base, Tucker becomes ill and while at the Red Base, Simmons meets resistance from Donut and Grif.

S4·E17 Core

Right To Remain Silenced

Mar 2, 2006 · 7 min

Simmons attempts to report the Blue's plans, while O'Malley, Doc, and Lopez return to the gulch.

S4·E18 Core

Things Are Looking Down

Mar 16, 2006 · 6 min

Sarge, Simmons, and Grif race towards the Blue Base, while Donut attempts to communicate in Spanish.

S4·E19 Mytharc

Two for One

Mar 20, 2006 · 8 min

Doc examines Tucker and the Reds discuss the appropriateness of hand to hand combat, sniping, and nuclear warfare.

S4·E20 Mytharc

The Arrival

Apr 1, 2006 · 7 min

Doc and Church discuss Tucker's pregnancy, while Andy plays Command's message for the Reds.

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