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In 1990, Scott Thorson testifies against the alleged mastermind behind the massacre at Wonderland. The trial doesn't go as planned, and Thorson enters witness protection. What ensues is a stranger-than-fiction series of events… if we believe him.

FREE MGM+: WONDERLAND MASSACRE & THE SECRET HISTORY OF HOLLYWOOD

FREE MGM+: THE LAST MAN STANDING

Scott Thorson tells of building a drug empire in Hollywood in the 1980s, while the crack epidemic in Los Angeles explodes - all before being discovered as the missing puzzle piece to the Wonderland case almost a decade after the murders.

FREE MGM+: UP IN SMOKE

The last known surviving witness in the case, Scott Thorson, shares what he overheard the night of the murders, as well as the details of his extraordinary life with Liberace, Hollywood elite, and the drug underworld of 1980's Los Angeles.

FREE MGM+: THE MAN WHO KNEW TOO MUCH

Crime novelist Michael Connelly revisits one of the most famous murder cases in the history of Los Angeles -- the 1981 massacre at Wonderland Avenue -- which involved a colorful cast of characters, including a legendary porn star and a drug kingpin.

FREE MGM+: THE HEAT OF A COLD CASE

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Best-selling crime novelist, Michael Connelly, narrates the story of the massacre at Wonderland Avenue on July 1, 1981, one of Hollywood's most famous murder cases that has fascinated people for more than 40 years.

S1 E2 | FREE MGM+: THE MAN WHO KNEW TOO MUCH

E4 | FREE MGM+: THE LAST MAN STANDING

E3 | FREE MGM+: UP IN SMOKE

E2 | FREE MGM+: THE MAN WHO KNEW TOO MUCH

E1 | FREE MGM+: THE HEAT OF A COLD CASE