Levy Tran joined MacGyver partway through Season 3 as Desiree "Desi" Nguyen. She was cast to at least partly fill the place left by George Eads. Eads chose to leave the show (after an on-set altercation), with his character Jack Dalton still alive but out on a mission after the February 1, 2019 episode. Desi joined the Phoenix Foundation in Season 3 to help protect Angus "Mac" MacGyver (Lucas Till) and his team, and it looks like she'll be upped to series regular status for Season 4.
That's the word per Deadline, which noted that the original plan was to bring in Desi as a recurring character in Season 3 and make her a regular in Season 4, if CBS renewed the show.
MacGyver was indeed renewed for Season 4, and CBS announced some changes behind-the-scenes. Terry Matalas (12 Monkeys) is jumping on board as executive producer/co-showrunner, replacing Craig O’Neill as co-showrunner alongside Peter Lenkov.
As for Levy Tran's Desi, she has quickly made some fans, with some viewers shipping her with Mac. Other viewers don't want Mac with Desi, in some cases because they like him with Riley Davis (Tristin Mays).
Whatever happens on that front in Season 4, actress Levy Tran is just happy to be along for the ride. Here's what she wrote when it was announced that CBS had renewed the show:
Season 3 of this reboot of the 1985 MacGyver averaged between 5-6 million viewers per Friday night episode, picking up between 1-2 million more with DVR viewing. CBS has yet to announce a Season 4 premiere date, or episode count, but Season 1 had 21 episodes, Season 2 had 23 episodes, and Season 3 had 22 episodes. All three seasons premiered in September, so there's a very good chance Season 4 will start airing its 2019-2020 season this fall.
In case you're reading this before the Season 3 finale airs (or it's after the finale and you want a reminder of the general outline of the episode), here's the logline per CBS:
"Mason + Cable + Choices" - MacGyver faces off with a cunning new adversary whose carefully crafted plans put Mac at the epicenter of an impossible choice: save the life of a friend, or save the lives of hundreds of innocents. Also, Mac receives new information that will drive a wedge between him and his father (Tate Donovan), on the third season finale
That final episode of MacGyver Season 3 airs Friday, May 10 from 8 to 9 p.m. ET/PT on CBS. Keep up with all the 2019 renewals and cancellations with our handy guide.