Season 4 Episodes20
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Ranked #1 of 13 in Season 4•+2.5 vs season avg
In one of the most notorious missing children cases, Adam Walsh, 6, steps into a stranger's car and disappears. A manhunt is launched but Adam's severed head is found two weeks later. More than a quarter of century passes before the mystery is solved.
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"The Lost Boy" is episode 10 of Cold Blood season 4. It scored 8.4/10 from 13 votes, ranking #1 of 13 episodes this season (season average 5.9). It aired on December 20, 2011.