Leland, the psychotic leader of Codex (played by Tobin Bell, from the SAW movies), decides that Aunt Gwen (7 of 9 STNG actress Jeri Ryan) has compromised her team by trusting her nephew Angus. So he kills everyone on her team.
Really lame, considering that some of those characters were pretty interesting and could have continued to be ongoing villains. The few villains that survived the initial Codex massacre by Leland, later got killed off by the Phoenix agents.
The Codex plan was to put a nuke into the Yellowstone Park underground volcanoes and make the super-volcanoes blow up, and cover the earth with volcanic ash. In theory, most of life on earth could die. Even Yogi Bear was angry about this.
The Phoenix team works to stop the plan, and along the way, Angus gets his anti-nuke timer broken by the last surviving Codex villain. Now somebody has to die in order to stop the nuke, and it is between Angus and Aunt Gwen.
A real MacGyver would have figured out another way to make the timer work, by using a matchstick and a rubber band; or he should have created another anti-nuke gizmo. That is the whole point of being MacGyver. But Angus has no clue, and he just punts to Aunt Gwen and runs away.
It was great to see Jeri Ryan in these recent episodes. She is an excellent actress and she brought great passion to her role as Aunt Gwen. I hope that she will be back. Ryan brings real energy to her role, and she is believable as a misguided person who wants to do good.
Tobin Bell is a very boring villain. Bell has all the energy of a pet rock. The difference between Jeri Ryan and Tobin Bell is literally like day and night.