Henry Ian Cusick, who'll always be time-traveling Desmond Hume from "Lost" to us, is joining star Lucas Till as a series regular on "MacGyver."

Per CBS’ character description, Russ is a handsome, quick-witted, Oxford-educated ex-Military man. A master manipulator and salesman and skilled in propaganda and lie detection with an extremely high emotional intelligence, he’s also a very wealthy man. He’s used to getting his way and not beyond enjoying the spoils of war: expensive suits, fast cars, private jets, house in Monte Carlo.

Also new for Season 4: Levy Tran has been promoted from recurring to series regular after the exit of former co-lead George Eads.

And there are some behind-the-scenes changes as well:  For the fourth season Terry Matalas recently replaced Craig O’Neill as co-showrunner alongside Peter Lenkov. Other executive producers include James Wan, Henry Winkler and Lee Zlotoff.

Since "Lost," Cusick's costarred on "The 100," "The Passage," "Inhumans" and "Scandal."

[Via The Wrap]