The Necessary Evil is a lost 1925 American silent drama film directed by George Archainbaud and starring Ben Lyon, Viola Dana, and Frank Mayo.

As described in a film magazine review,[2] Dick Jerome, adored of women and always forgiven of everything because of his good looks and disposition, has married the good and beautiful Frances, who was also loved by Dick's employer, David Devanant.

Dick dies while assigned to South America, and David marries Shirley.

Frank learns of the method of his father's death and swears that he will break his stepfather.

It provides to Frank proof of his father's unworthiness and states why David always acted as his stepson's enemy: so that he can face Frances in the beyond, knowing that he made a man of her son.