While the title was used for S1E13 rather than S1E11, it is a fan-favorite "story" because it reveals the season-long deception of Captain Gabriel Lorca.
: The story follows Datak Tarr’s ruthless quest to become Mayor. He makes a secret deal to sell the town’s valuable mines to the Earth Republic in exchange for power. [S1E11] Past Is Prologue
: It is revealed that the Lorca fans had been following was actually from the Mirror Universe. He spent the entire season manipulating the Discovery crew to return to his home dimension and launch a coup against the Emperor. While the title was used for S1E13 rather
: Stahma Tarr is revealed to be even more cold and calculating than her husband, manipulating those around her—including her own son—to protect their family's interests. [S1E11] Past Is Prologue