So after some space warfare between the Covenant fleet, the UN Space Command and the new Spartan 3, the Master Chief sees that most of the Spartan 3 (Junior Varsity) and Kai are getting wiped out. MC finally puts on his big boy pants (armor) and does some super-soldier fighting, and he turns the tide for the Spartans. Most of this season the so-called Master Chief has done nothing, and has been without his armor.
After MC helps out, Kai takes over a Covenant ship and crashes it into the main Covenant warship and blows it up (and seems to have died). Finally the good guys win one.
Kai also avoids detonating the K-Spike that would have vaporized everyone on both sides, which was what Shabana Azmi, who plays Admiral Parangosky wanted to do. Thanks to Cortana, the UN Command is convinced that the Covenant will always win, so they were ready to engage in "Mutually Assured Destruction" of everyone.
Meanwhile MC takes off for the final confrontation with the big Mega-Lizard guy, at the Halo pocket universe, where blonde Makee and Mega-Lizard guy are waiting.
The fight between MC and Mega-Lizard guy is not awesome, but at least this time MC wins. Considering that the whole season was building up to this fight, it would have been nice to see something a lot more impressive.
So far the most impressive thing about Halo is that Makee's hair looks like a DEVO helmet. When her Lizard Master dies, Makee / Super Sonic tells MC that "she is a demon too" and she gets into the secret building first, and closes the doors. Sonic the Hedgehog (Makee) is smarter, and ahead of MC when it comes to the Halo power. Hopefully she will not end up as Master Chief's boyfriend.
MC gets help from Cortana, and what seems to be the guardian of the building, another floating light-bulb. They are going to help him understand what to do. Some narration tells us that there is more to come... next season.
Meanwhile psycho Dr. Halsey and her daughter unleashed a zombie plague while they were just randomly picking things up in the cave. The tie between the mother and daughter is that they are the two most irresponsible, treacherous, and negligent scientists in the human race. Sadly, in this TV series, a lot of the human characters are not very admirable.