Season 4

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.

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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