Robert Downey Jr. portrays four different characters in the new HBO series “The Sympathizer.” In the official trailer for the upcoming series, the 58-year-old actor looks completely unrecognizable.

The trailer begins with Downey Jr. saying to “Captain” Hua Siu Đệ: “Welcome to the world of espionage!” Siu Đệ, whose character describes himself as a “synthesis of incompatibilities,” uses his skills to become a spy. Downey plays his handler. Later in the trailer, it is revealed that the “Captain,” working for both the CIA and the Viet Cong, may be a double agent.

According to The Hollywood Reporter’s logline, the series is described as “a spy thriller and intercultural satire about a half-French, half-Vietnamese communist spy in the final days of the Vietnam War and his new life as a refugee in Los Angeles, where he learns that his spy days are not yet over.”

The series will premiere on April 18th.