When does Anita Hailey make an appearance in detective Conan?

Anita Hailey, also known as Haibara Ai, makes her debut in the "Detective Conan" series in episode 129, titled "The Tenth Passenger." She is introduced as a key character with a mysterious past and is later revealed to be a former member of the Black Organization. Anita plays a significant role in the series, particularly in her interactions with the main character, Shinichi Kudo, and the other members of the Detective Boys.