Complex sentence: A man dressed in a 20th-century Earth business suit materializes, carrying a black cat named Isis and introduces himself to Captain Kirk (William Shatner) as Gary Seven (Robert Lansing).
Split into simpler sentences: A man dressed in a 20th-century Earth business suit materializes, carrying a black cat named Isis. He introduces himself to Captain Kirk (William Shatner) as Gary Seven (Robert Lansing).