Halo: Blood Line Issue 5

Halo: Blood Line Issue Five is the fifth and last issue of the Halo: Blood Line limited comic book series. It was released on May 5, 2010.

Plot synopsis
Issue #5 begins with a status report by Iona explaining the events so far, in a message designated only to be relayed to UNSC command in the event Team Black is neutralized.

The story opens with Black-Four, having an uncontrolled emotional outburst as a result of manipulation by 686 Ebullient Prism, attacking Black-Three despite Three's and Iona's attempts to reason with him. He then removes Iona's storage chip from his helmet and tries to crush it, but Four dives in to save her. Meanwhile, Thon 'Talamee and the remaining Covenant watch the two Spartans fight. Thon is then contacted by Reff, who has escaped captivity and reached the installation's control center with Black-One. The Covenant proceed to the control center while leaving the Spartans to settle their own matters themselves.

Black-One, investigating the installation's control panel, then contacts the rest of the team and tells them to proceed to the control room, marking it with a NAV point on their HUDs. She discovers that the facility possesses a weapon that can fire directly into Slipspace, and that it is the weapon that brought down their ship, as well as the Covenant one. She also detects a large Covenant fleet moving toward their position and asks for the status of the team.

To her surprise, she finds that Three and Four are fighting each other. Three tells One what the fight is about, which causes One to remember the incident. In order to snap Four out of his tantrum, she tells him that she forgives him for telling on CPO Mendez about her and Three, something she never did before. This, combined by Iona showing him images of the team's previous missions together, reminds Four of the importance of the only "family" he has. Four comes back to his senses, and tells Three how good he felt when they got back at Red Team for taking One's eye out.

With the issue resolved, One orders Three and Four to make their way to her position. Just then, a Hunter slams her head into the command console. Thon, having just arrived at the control center, tells Reff that now that they are reunited, the truce with the humans is over. He then notices the approaching Covenant supply convoy on the control panel display, and wonders if they could use the machinery to send a message to High Charity. However, Reff has other plans: In religious fervor, he proclaims that they must use the Installation's weapons to bring the supply convoy down, claiming that it was destiny that brought him here to build a "new Covenant".

Thon, scolding his brother for speaking heresy, won't allow Reff to stain their family name, and proceeds to kill him. However, Reff has stolen Thon's energy sword and impales his brother with it. He then begins targeting the installation's weapon systems to fire on the Covenant fleet while Black-One begins to recover. Reff is interrupted by Ebullient Prism arriving at the control center, backed up by an army of Sentinels and Gatherers. The Monitor tells Reff to step away from the console, but he refuses. Prism then vaporizes Reff from the legs up with his energy beam. Three and Four then arrive at the chamber, followed by Two, and the team fight the Monitor and the Sentinels. Damaged, the Monitor flies into the shaft of the installation's main weapon, just as One activates it. The energy surging through the shaft vaporizes the Monitor as the weapon fires into space, bringing the entire Covenant fleet down on the moon's surface.

After the team makes their way back to the installation's entrance, Iona scans the wreckage and discovers that they may be able to use one of the crashed ships to escape. It is also revealed that the Monitor made Black-Two's wounds look far worse that they actually were and all damage was fixed by biofoam. Before they proceed out of the structure, Iona informs that there are still over a hundred live Covenant outside. While she suggests they wait for them to die of asphyxiation or injuries, the team storms out to engage them, with Black-Three declaring the odds of the fight to be "almost fair" for the Covenant.