Simplify the following text for a Grade 11 native English-speaking person.
Original: Lawless appeared as D'Anna Biers , a reporter with the Fleet News Service who worked on a critical documentary about the crew of the Galactica and was later revealed to be a Cylon ( Number Three ) .
Simplified: She portrays D'Anna Biers , a reporter with the Fleet News Service who works on a critical documentary about the crew of the Galactica and is later revealed to be a Cylon .