Production on the third installment of the Iron Man franchise started up again this week (begs01Oct12) almost a month after Robert Downey, Jr. was injured on set.

The actor, who plays billionaire crimefighter Tony Stark in the blockbusters, suffered an ankle injury in August (12) during a stunt sequence, forcing the movie to shut down so he could recover.

After a month of recuperating, Downey, Jr. returned to work in Miami, Florida earlier this week to begin shooting the remaining scenes. The film is due out in May 2013, and also stars Gwyneth Paltrow, Don Cheadle and Guy Pearce.