It's Christmas, and Master Chief and Arbiter hang their stockings up for gifts from Santa.

Master Chief, having opened his gift from "Santa" early, a copy of Halo Anniversary, immediately proceeds to play it all the way to the new year.

Chief continues to be haunted by visions of Cortana. Following his in-depth discussion with Eugene, Arbiter makes a rash decision.

The toys accept the gift of the Fragban 2.0 software patch (with the capability of banning players upon fragging them) from Eugene, and wreak havoc throughout online matchmaking with it after Colin gives the clan the green light to proceed with its usage.

Six weeks have passed since the toys acquired the Fragban software patch from Eugene. Arbiter continues to deteriorate. The toys are informed by Eugene of an imminent memorial service for a deceased teenage gamer to be hosted online and in-game.

Having finally discovered the usage and purpose of the console-bricking software they stole from Tyler, Brody and Kyle find themselves at odds over whether to use the files to ban Eugene or submit them directly to the administration in the hopes that a firmware fix will be developed. Eugene, Tyler, Colin and the toys await the start of the memorial service (seen in the season's premiere episode).

A jarring glimpse of two weeks into the future teases a terrible fate for the toys. Following the memorial service crash, the toys find themselves at the peak of their happiness. Eugene and Tyler obsessively await Brody's reappearance. Arbiter has a revealing conversation with Colin.

Master Chief's visions of Cortana intensify to the point where the two converse, and uncovers a dark secret of Colin's.

The toys discuss which course of action to take in response to Colin's inappropriate conduct with a minor online, and are given a jarring glimpse of Eugene's malice.

The toys struggle with divorcing themselves from the only friends they've ever made online and defecting from the clan.

Eugene receives devastating news. The toys reflect on their defeat by Eugene and his co-moderators and discuss retaliation.

Following the banning of the toys and the news of Madeline's abrupt passing, Eugene suggests he, Tyler and Colin get the most out of Fragban while it's functional by initiating a merciless banning rampage. Meanwhile, Master Chief decides to put Colin's private IRC server info received from Peter, the young boy who was under the threat of sexual assault, to worthwhile use.

The toys fight against Eugene and his co-moderators until only one side is victorious.

The toys struggle to come to terms with Eugene's suicide and the take-down of his co-moderators.

As Arbiter, Chief, Cortana and Greg ponder what to do with their lives following the finale of the serialized story-driven seasons, the crazy Hollywood executive Skyler Loveheart (featured in Arby 'n' the Chief: The Movie) returns with the intent to reboot the show.

Chief finally reveals his big wiener to Arbiter. Hi-jinks ensue.

With the help of Skyler Loveheart, now voluntarily Chief's political campaign manager, Chief ventures to become the new prime minister of Canada, hoping to sway voters with his big wiener.

During an exchange of scary stories on Halloween night, Chief tells three terrifying tales back-to-back.

A message from the Arbiter to Arby 'n' the Chief viewers for Christmas 2023.

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It's Christmas in 2010; Master Chief, Arbiter and Greg discuss the possibility of doing a fifth season of Arby 'n' the Chief over a game of Scrabble.

Inspired by seeing the new Forge visual filter objects in the Legendary Map Pack, Master Chief is inspired to create his own map.

Picking up from where episode 11 left off, Todd, Travis and the Chief get into an epic rumble that eventually gets broken up by the Arbiter and Cortana. However, the next morning, Todd and Travis are nowhere to be found, and Cortana blames the Chief... but did he really have anything to do with their disappearance?