16. Wendy's Heroin Shot
Season 5, Episode 12: "Darthy"
Jax's first wife and the mother of his first child Abel, Wendy Teller (played by The Sopranos all-star Drea de Matteo) is a meth addict who disappears for a few seasons. When she eventually returns, she's cleaned up and keen to re-enter her son's life, working to get the boy away from Jax and Gemma. But her ex keeps Wendy in check by injecting her with heroin, saying he's going to contact the authorities to demand she be drug-tested unless she backs off. The show's fifth season was where it really began to crank up its depravity, and Jax's cruelty toward his former spouse stood out as one of grimmer plot twists.