" Poenitentia ," the third episode of Sons of Anarchy's sixth season, is a pivotal installment that centers on the themes of penance and the escalating consequences of past sins. The episode title itself, Latin for "penitence" or "repentance," underscores the internal and external struggles of the main characters as they face the fallout of the school shooting and their ongoing criminal entanglements. “Poenitentia” Sons of Anarchy Season 6 Episode 3 Recap