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Knock Knock

“48 Hours” uncovers the narrative behind crime and justice cases that have left a lasting mark on society. Award-winning CBS News correspondents thoughtfully examine the complexities of each crime by transporting you to the heart of the investigation through key evidence and gripping interviews with critical figures from the case. The unmatched reporting has made a tangible difference in countless lives, leading to the exoneration of wrongly convicted individuals and the reopening — and resolution — of previously closed cold cases.Listen to a new “48 Hours” episode every Monday&nbsp;and&nbsp;then go deeper into the case on Tuesdays with the immersive “Post Mortem” series — producers and correspondents join host Anne-Marie Green to discuss key evidence, dead ends, mishaps, and stranger-than-fiction twists they faced in the field. Plus, every Thursday, we’ll revisit a classic “48 Hours” episode.&nbsp;Watch “48 Hours” Saturdays 10/9c on CBS and Paramount+. 48 Hours listeners can use discount code "HOURS20" for 20% off all 48 Hours products on ParamountShop.com.