The Phantom Foe is a 1920 American fifteen-chapter adventure film serial directed by Bertram Millhauser and starring Warner Oland.

She explains that her father Jeremiah Dale (Goodwin) had been the unwitting cause of the death of the wife and brother of her uncle Leo Selkirk (Oland) years before by bringing about a massacre for unjustly punishing three Indians.

He grapples with the unknown person and a fight ensues with Bab being worsted when Steve Roycroft (McCutcheon), a scientific detective, and Janet arrive, causing the muffled figure to flee in an automobile.

They return to the house and find Leo Selkirk, believed by Bob to be an enemy, and Janet's Cousin Esther (Cassavant).

When she closes the door, the episode ends as she sees the muffled figure rise from a seat in the corner and advance towards her.