The actor explained to Entertainment Weekly that the fourth episode of the new run will feature a "big murder twist".
"There is a big baddie coming, and it has to do with the murder," he said. "And the murder involves Michael very, very specifically."
He continued: "The bad guy who did that... is going to become a huge, formidable foe, but that's going to be really in the second half of the season, way down in... August."
Donovan also confirmed that Michael will remain part of the CIA, working alongside new partner Max (Grant Show), after being recruited back into the agency in the fourth season finale.
"Michael has his CIA job for the first three episodes, and the rest of the team... don't really come across [Max] too much," he explained. "Their issue is never going to be with Max, their issue is always going to be with Michael and the choices he makes."
Burn Notice will return to USA on June 23.
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