LEGO CMF (Minifigures Series) 4 was released in April 2011 and features 16 unique minifigures. Prominent characters include the Hazmat Guy, Werewolf, Sailor, and Crazy Scientist. The series continued using the bump code system for identifying minifigures within blind bags. Other notable figures include the Viking, Kimono Girl, The Monster, and Musketeer.
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