Many years ago, the scientist now known only as the Mist creted an "Invisio - Solution" that could turn people and objects invisible. He tried to sell it to the US government during World War 1 only to be met with rejection and scornful disbelief. The Mist vowed revenge and after World War Two began in Europe, he sent invisible 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 would become his main adversary, Starman (Ted Knight).

Later, the Mist used a variation of his Invisio Solution to hypnotose innocent people into commiting crimes for him. Starman foiled the Mist once more. The Mist would try a similar scheme many years later, but this time the Black Canary teamed up with Starman to defeat him.

Over the years, the Mist's repeated use of the invisio solution has had a cumulative effect, enabling him to take on a truly mist - like form. He became a member of the Secret Society of Super Villains under the leadership of the Ultra Humanite.