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Starring Pip Donaghy in the title role , the series follows the same plot as the original book , of a deranged scientist who discovers a formula by which to make himself invisible , but is driven to insanity by his inability to reverse the formula and is evoked to use his invisibility to terrorize those around him .
 person: Pip Donaghy
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: Pip Donaghy