Character actor Edgar Barrier, unhappy with the way his career was shaping up at Universal, dropped out four days before production began. He was quickly replaced by Lester Matthews.
Despite having the same surname of two other invisible men, Robert Griffin (Jon Hall) actually bears no relation to them.
Part of the SON OF SHOCK package of 21 titles released to television in 1958, which followed the original SHOCK THEATER release of 52 features one year earlier.
Shooting lasted from January 10-February 17, 1944, released June 9.
This is generally considered to be Universal's last entry in the 'Invisible Man' series. Seven years later the studio spoofed the series with Abbott and Costello Meet the Invisible Man.