Choice - [s1e10]

: Decides to break her non-disclosure agreement (NDA) to find the truth, a decision marked by a vulnerable yet assertive speech to a witness.

: Officially expresses her desire to date Henry, moving past her previous hesitation. [S1E10] Choice

: " Not All Who Wander Are Lost " — The season finale where Kat travels back to her father's funeral and has a major breakthrough regarding her brother Jacob's disappearance. : Decides to break her non-disclosure agreement (NDA)

If you are referring to a different series, here are other notable 10th episodes from the first seasons of popular shows: [S1E10] Choice