Simplify the following text for a Grade 11 native English-speaking person.
Original: In the 2007 episode `` Utopia '' , the Doctor calls the transformed and disguised Master a genius and shows admiration for his intellect before discovering his true identity .
Simplified: In the 2007 episode `` Utopia '' , the Doctor calls the disguised Master a genius and shows an immense admiration for his intellect before discovering who he is .