Police arrest a chemist for murdering his partner when they find his body at the bottom of the stairs and he had left a note indicating that they had quarreled. The thing is, he did not kill him. He was busy using his invisibility potion to rob the bank but he is unable to convince the police to believe his alibi since he burned the money and formula when he saw the police approaching.
A pilot flies a new plane that is so fast it goes 5000 years into Egypt's past and he marries Pharaoh's daughter. He mysteriously pops back into the present, but the plane stays in the past. The court martial is going to throw the book at him for telling such a preposterous story, but archeologists in Egypt uncover the plane in a burial crypt.
A nobody gets struck by cosmic rays and they give him super powers which he uses to combat various menaces. The powers wear off after a time, but his experience has given him a new positive outlook on life.