S1, E8: Billie assigns Van and Deaq to infiltrate an Asian drug ring. Already undercover in the gang is Alexa Tan (Catherine Kwong), Billie's best friend from the police academy. Despite Billie's overprotective warnings, Deaq becomes romantically involved with Alexa, leading to a major confrontation with Billie. The situation quickly worsens when Alexa's identity as a cop is exposed, putting her life in danger.