2x5 - My Girlfriend is an Alien

Fang Leng, by revisiting his memory database, recalls an incident he had forgotten involving a woman, but soon realizes that he had never really forgotten Chai Xiao Qi. Dr. Zhang's analysis leads Fang Leng to believe that Chai Xiao Qi was a woman he had met during a business trip to the United States, which would explain her persistent behavior toward him.