2. Is Polly Cooper truly crazy?
Early on in season 1, it’s established that Alice and Hal sent a pregnant Polly away to a corrupt group home called The Sisters of Quiet Mercy in hopes that she could have Jason’s babies in secret and that the later revealed to be sinister nuns would convince Polly to relinquish her feelings for Jason. Betty breaks her out and while Polly appears to be a caring an devoted sister, she also starts exhibiting concerning behavior after Jason’s killer is caught, running away to live at The Farm, which Betty knows to be a cult.
While Polly’s insanity was fabricated by Hal and Alice as a cover up for Polly’s pregnancy, it could be possible that Polly’s time in solitary confinement under the sisters’ care twisted her mind a little too much. In addition to encouraging Alice to join The Farm, Polly is also the one who conducts Alice’s “Baptism,” drowning her own mother in the process. Later, in season 3 episode 21, Polly participates in Edgar’s mind games to convince Betty that she’s a serial killer.
All signs seem to point to Polly being crazy, but was it just a cover up for her mom working with the FBI? Time will tell.