Seriously? OMG! WTF?

SEASON 2: EPISODE FIVE – "The Dark Defender"

Dexter discovers the man who killed his mother, before his young eyes, is still alive. When he shares this information with Lila, she suggests he face the man, as part of his "steps" to addiction recovery. And as his sponsor she insists on tagging along. But when Dexter finds his mother's murderer, his killer urges push him back to the knife's edge.