An innocent man (Vincent Price) sentenced to death for the murder of his brother escapes from prison with the assistance of a doctor friend (John Sutton). The doctor injects him with a serum that renders him invisible. The downside is that without an antidote, the serum will eventually make him insane. This was the first of three sequels that Universal made carrying on from the 1933 film of H.G. Wells' THE INVISIBLE MAN. As sequels go, it's not bad at all. Though the direction by Joe May doesn't have the assured hand of James Whale (the director of the 1933 film), it's a commendable effort with an effective story line and a solid performance by Price in the title role. Sir Cedric Hardwicke as the real murderer makes for an efficient villain. Though the film can't help but retread some of the same ground of the earlier film, the special effects are good and the movie entertaining enough to hold one's attention. Also in the cast: Cecil Kellaway, Alan Napier and Nan Grey (DRACULA'S DAUGHTER), looking like Jane Wyman, as Price's loyal fiancee.