Complex sentence: Helen Dexter is a highly formidable and cunning Director of the CIA, who is aided in her vicious ideas by her equally shrewd sycophant, Nick Gutenburg, the deputy Director.
Split into simpler sentences: Helen Dexter is a highly formidable and cunning Director of the CIA. She is aided in her vicious ideas by her equally shrewd sycophant, Nick Gutenburg, the Deputy Director.