'MacGyver' Season 4 Ending Explained: What's next for Codex and the Phoenix Foundation?

The board's been reset and the players will be different but rest assured, Codex will be back with a vengeance
Tobin Bell (CBS)
Tobin Bell (CBS)

Spoilers for 'MacGyver' Season 4 Episode 13 'Save + The + Dam + World'

'MacGyver' Season 4 may have ended but the threat of Codex, the global eco-terrorist organization, which has hounded Angus "Mac" MacGyver (Lucas Till) and the Phoenix Foundation all season is far from over. The board's been reset and the players will be different but rest assured, Codex will be back with a vengeance.

The season finale, 'Save + The + Dam + World', brought the season's storyline to a fitting conclusion with the last-minute redemption and death of Mac's aunt and Codex leader Gwendolyn Hayes (Jeri Ryan). But as the last few episodes have revealed, Gwen was never the all-powerful head of Codex that we thought she was. 

Above her in the hierarchy at the organization are Leland (Tobin Bell) and the Codex council, a group that has apparently existed since the time of the Black Plague. While Codex's immediate plan to trigger the Yellowstone supervolcano and cause a global apocalypse may have been thwarted by the Phoenix Foundation, the leadership managed to go into hiding so the head of the proverbial snake is still intact. 

Though the initial plan was indeed to end the season with Episode 13 more scripts that allude to Codex were written after CBS extended the season to 22 episodes, as series regular Henry Ian Cusick, who plays Russ Taylor on the show, had previously revealed to MEA WorldWide (MEAWW). Though the coronavirus pandemic caused the season to get shortened again, we're hoping that those scripts will be put to use in the next season of the show, whenever the show comes back on air.

On the bright side, now that his aunt is no longer the face of the organization, Mac won't have any qualms about crushing Codex whenever they rear their heads again. Also as the finale revealed, the Phoenix Foundation is taking concrete steps to ensure that climate change is addressed as a pressing issue and given the proper importance it deserves, which could hopefully make Codex's mission obsolete. Whether that will stop them or not is a different matter altogether.

'MacGyver' Season 4 Episode 13, the season finale, aired on May 8 at 8 pm on CBS.

GET THE BIGGEST ENTERTAINMENT STORIES
STRAIGHT TO YOUR INBOX.

MORE STORIES

‘Chicago Fire’ reveals when the first ‘One Chicago’ crossover of the season will happen
2026-11-12T08:52:55.000Z
Abe’s recent hand tremors have already raised concerns about his health in Salem
2026-11-12T08:23:38.000Z
Charlie Vickers and his ‘The Rings of Power’ co-stars hint at Sauron’s next move and the Season 3 moments that left even the cast struggling for words
2026-11-12T07:50:09.000Z
Nearly three decades after their 1997 horror film, Jennifer Love Hewitt and Ryan Phillippe are sharing the screen again, this time in the ‘9-1-1’ franchise
2026-11-12T06:55:17.000Z
The Hulu spinoff follows nine MomTok creators in California, with Jen Affleck as the lone original star
2026-11-12T05:10:11.000Z
FX’s comedy series ‘Adults’ follows five friends sharing a home in Queens as they navigate adulthood
2026-11-12T04:36:21.000Z
'Chicago Fire' Season 15 Episode 6 reveals Violet's mother's heartbreaking condition
2026-11-12T04:24:26.000Z
A leadership change at DC Studios left the status of the Kyle Chandler and Aaron Pierre series in question
2026-11-12T04:05:49.000Z
'Chicago Med' Season 12 Episode 6, titled 'Lessons in Chemistry,' sees Freddy return to sign Margaret's estate papers alongside Charles
2026-11-12T03:18:28.000Z
Quinn Shephard and Gina Gammell's coming-of-age story blends horror with teen drama
2026-11-12T03:00:28.000Z