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When the Doctor appears aboard the ship with the Master 's own future incarnation , he meets his successor , Missy ( Michelle Gomez ) , who is struggling between her nature and a promise to reform her ways .
 person: Missy; person: Michelle Gomez
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Missy; person: Michelle Gomez