Na Trioblóidí  "Na Trioblóidí (Irish for The Troubles), is the thirteenth and final episode of the second season of the FX television series "Sons of Anarchy". It was written by Jack LoGiudice, and directed by Stephen Kay. It originally aired in the United States on December 1, 2009. This episode marks the final appearance of Johnny Lewis (Half-Sack Epps), Adam Arkin (Ethan Zobelle), Henry Rollins (A.J. Weston), and Sarah Jones (Polly Zobelle). Kurt Sutter, series writer and creator, said that Half-Sack was killed off because Lewis wanted to leave the show due to creative differences; "We decided we'd find some noble way for him to go. It wasn't my intent to try to be sensational and kill off a main character." Stahl orders Zobelle released from prison, as he is an FBI informant with information on several high-up players in government and in the Aryan Brotherhood. Zobelle refuses police escort, and the Mayans arrive in Charming to protect their investment in him. Zobelle's plans to skip town are delayed while Polly says goodbye to Edmond. Weston is also released, as Chuck's testimony is deemed unreliable because he is an ex-felon. Weston retrieves his children from state custody and uses their presence to protect himself from SAMCRO's reprisal. SAMCRO is able to isolate him in the bathroom of a tattoo parlor, where Jax kills him with a silenced pistol. Cameron Hayes calls his son Edmond, and orders him to kill Agent Stahl to prove his loyalty to the IRA. Edmond retrieves a gun hidden in his bathroom, but fails to execute. Stahl kills him when he attempts to run, then texts Cameron from his phone claiming that the deed is done. Meanwhile, Gemma spots Polly shopping for flowers and follows her to Edmond's home. Polly goes inside and sees Edmond's body, and when Gemma follows her in with her gun drawn, Polly assumes that Gemma killed Edmond and tries to shoot her. Gemma shoots Polly in the chest before the latter can, killing her, and Stahl emerges, offering Gemma a chance to get out before she is pursued. As Gemma turns to leave, Stahl tosses Gemma her own 9mm, and Gemma catches it instinctively. Stahl trains Polly's pistol on Gemma and tells her to drop the gun; Stahl plans to use Gemma's fingerprints to frame her for both deaths.