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Hanna deals with the return of her father, Tom Marin, and the realization that he is prioritizing his new family over her.

" Father Knows Best " is the 22nd episode of the second season of Pretty Little Liars , which originally aired on February 13, 2012. The episode focuses on the Liars investigating their fathers' potential secrets while "A" continues to pressure them during a father-daughter dance.

This episode is often cited by fans for its emotional weight, particularly the scenes involving the fathers. It effectively shifted some of the mystery's focus onto the older generation of Rosewood, expanding the scope of the "A" conspiracy. Pretty_little_liars_2x22

Aria finds a letter in her father's (Byron Montgomery) office that suggests he may have had more involvement with Ali’s disappearance or knows more about "A" than he lets on.

The Liars—Aria, Hanna, Spencer, and Emily—begin to suspect that their fathers might be hiding secrets that "A" is using against them. This suspicion arises after Aria finds a mysterious note and the girls realize that "A" often targets their family dynamics. Hanna deals with the return of her father,

The confirmation that Peter Hastings is Jason's father is a major turning point for Spencer's character arc.

The episode highlights the theme that the Liars' parents are just as prone to keeping secrets as the girls themselves. This episode is often cited by fans for

Spencer becomes convinced that her father, Peter Hastings, is the father of Jason DiLaurentis (Ali’s brother), which would make Jason her half-brother. This revelation adds another layer of complexity to the Hastings family secrets.