: Much of the episode focuses on Alexander Bonaparte Cust, a traveling salesman who is the primary suspect. His character serves as a study in trauma and marginalization. Through Cust, the narrative explores how society often targets the weak and the "broken" (in his case, a war veteran with epilepsy) as convenient scapegoats for complex horrors.
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Episode 2 of The ABC Murders shifts from the shock of the initial crimes to a deep dive into the psychological and societal decay of 1930s Britain.