Long ago, the scientist now known as the Mist created an invisio- solution that could turn people and objects invisible. He tried to sell it to the United States government during World War 1 but was only met with rejection and scornful disbelief.

The Mist vowed revenge and, after world war two began in europe, sent his inisible agents to steal all of America's military secrets. He also tried to use invisible planes to bomb factories geared for defence. However, the Mist's schemes were thwarted by the man who became his principal enemy, Starman (Ted Knight).

Later, the Mist used a variation on his invisio-solution to hypnotise innocent people into robbing for him. Starman foiled the mIst again. Decades later, the Mist tried this plam again, but was foiled by Starman and the original Black canary. Over the years, the Mist's repeated use of the inisio- solution had a cumulative effect, enabling him to take a truly mist-like form. He became a member of the Ultra Humanite's Secret Society of Super Villains, who often clashed with the Justice Society.